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Research Advances in Metabolic Regulation, Storage and Transport of Carotenoids in Plants YU Yin-feng, LIU Qing-qing, LIU Xiao-chun, ZHANG Da-sheng, CUI Li-jie Subtropical Plant Science    2024, 53 (1): 80-88.   DOI: 10.3969/j.issn.1009-7791.2024.01.012 Abstract （86）      PDF（pc） （367KB）（6660）       Knowledge map    Save Carotenoids are a group of natural pigments widely found in plants, which are generally composed of C40 terpenoids and their derivatives, which are connected from end to end of 8 isoprene units. In plants, carotenoids not only make plant organs appear color, but also perform important biological functions. In recent years, although the biosynthesis pathway of carotenoids is relatively clear, the mechanisms of metabolic regulation, including storage and transport of carotenoids in vivo are not yet understood. This paper briefly summarized the research progress of the biosynthesis, storage localization of carotenoids and terpenoid transporters, and focused on the potential substances that mediate carotenoid transport and the methods of identifying carotenoid transporters, in order to provide a better understanding of carotenoid synthesis and transportation. Reference | Related Articles | Metrics | Comments（0）

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Differences in Growth and Metabolics between Hydroponic and Peat Soil Cultivation Anoectochilus roxburghii ZHAO Qi, WANG Chi, ZHAO Feng Subtropical Plant Science    2024, 53 (1): 22-30.   DOI: 10.3969/j.issn.1009-7791.2024.01.003 Abstract （115）      PDF（pc） （419KB）（1555）       Knowledge map    Save The aim of the study was to systematically compare the differences in growth indexes and quality components between hydroponics and soil cultivation for 30 days and 90 days, and to investigate the main differential metabolic pathways of Anoectochilus roxburghii. The results showed that comparing with soil cultivation, the root length of hydroponics increased significantly on 30th day, and the root length and leaf area increased significantly on 90th day, but the stem thickness decreased. The net photosynthetic rate increased significantly on 30th day of hydroponics, and the chlorophyll content increased significantly on 90th day of hydroponics. In terms of components, total flavonoids and kinsenoside increased significantly on 30th day of hydroponics, and aspartic acid, γ-aminobutyric acid, and hydroxyproline decreased significantly; aspartic acid, asparagine, γ-aminobutyric acid, and methionine decreased significantly on 90th day of hydroponics. On metabolic pathways, lipid, flavonoid and flavonol biosynthesis, diterpene and secondary metabolic biosynthesis were significantly up-regulated on 30th day, and lipid and secondary metabolic pathways were significantly up-regulated, while diterpene biosynthesis underwent a down-regulation on 90th day in the hydroponically grown group compared to the soil-grown group on 30th day and 90th day. Reference | Related Articles | Metrics | Comments（0）

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Regulation of Leaf Functional Traits and Plasticity on the Growth of Hedyotis caudatifolia in Different Habitats WEI Lan-ying, ZENG Chun-yang, YANG Xiao-lan, HUANG Dao-jing Subtropical Plant Science    2024, 53 (2): 100-112.   DOI: 10.3969/j.issn.1009-7791.2024.02.002 Abstract （136）      PDF（pc） （3264KB）（1539）       Knowledge map    Save Most previous researches of plant adaptability to environmental changes were conducted using functional traits at species level. However, one species might displayed distinct ecological strategies in different habitats. Therefore, it’s important to analyze the intraspecific variation of leaf functional traits and their plasticity for understanding the environmental adaption mechanisms and survival status of plant individuals. The present study determined the plant height, biomass and leaf functional traits such as morphological, stomatal, anatomical and chemical characters of medicinal plant Hedyotis caudatifolia from four habitats (grassland, shrub-grassland, forest edge and understory) in Mt. Dayao of Guangxi. Results showed that functional traits varied apparently among different habitats. Among all leaf functional traits, potential conductance index (PCI) exhibited the highest coefficient of variation (CV), while CV of leaf carbon content, looseness of leaf spongy tissue, spongy mesophyll thickness and leaf thickness were lower. Plasticity index (PI) ranked inconsistently with CV for some traits, i.e. potential conductance index displayed the highest PI, followed by mass-based chlorophyll content, leaf area, specific leaf area and ratio of leaf palisade to spongy mesophyll thickness, etc. Principal component analysis (PCA) indicated that the variations of leaf functional traits were closely correlated with light utilization, water conductivity and nutrient strategies, dominated by light adaptation. Analysis of Variable Importance in Projection (VIP) revealed that anatomical structure contributed to the most variances of plant height and biomass, followed by stomatal characters; chemical traits accounted for the least in the contribution rates. The changes of leaf functional traits and their syndromes of H. caudatifolia facilitated itself in utilizing natural environmental resources such as light and water. Thus, it was capable of coping with disadvantages in different habitats, and finally promoted the plant growth and biomass accumulation, which enabled its individuals to compete with other plants in the community for the further survival and reproduction. The study will provide references for the assessment of survival status and safety risk of H. caudatifolia under degraded habitats. Reference | Related Articles | Metrics | Comments（0）

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Identification and Expression Analysis of PYL Gene Family in Eriobotrya japonica LIN Qiu-xiang, HAN Yu-xin Subtropical Plant Science    2024, 53 (1): 1-11.   DOI: 10.3969/j.issn.1009-7791.2024.01.001 Abstract （84）      PDF（pc） （452KB）（1351）       Knowledge map    Save Abscisic acid (ABA) is one of the important hormones regulating plant growth and development, and abiotic stress. As an ABA receptor, PYL is located at the top of its signaling pathway and plays a core regulatory role. However, this gene family has not been identified and analyzed in detail in loquat. In this study, 12 PYL genes were identified in loquat based on bioinformatics analysis. The molecular weight of the coding PYL protein ranged from 10.47 to 29.12 kDa, and most of them were localized in the cytoplasm. PYL family genes were distributed on 8 chromosomes. Phylogenetic tree analysis showed that PYL gene family could be divided into three subfamilies and EjPYL1 was closely related to AtPYL13. PYL proteins in loquat were consisted of motif 1-6, and motif3 was the common domain. Genes of PYL family were collinearity in species loquat. There were 2 pairs of collinearity between loquat and Arabidopsis thaliana. Cis-components in promoter of PYL genes were related to low temperature, drought, light and hormone response. RNA-seq of loquat young fruits indicated that EjPYL6 and EjPYL8 were both up-regulated by low temperature in fruit pulp and seeds. This study can provide theoretical basis for further understanding ABA signal transduction pathway and breeding new varieties of loquat with frost resistance. Reference | Related Articles | Metrics | Comments（0）

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Effects of Exogenous Strigolactone on Axillary Bud Elongation and Expression of Genes Related to the Strigolactone Metabolic Pathway in Tobacco TIAN Hui-yuan, TANG Bo-xi, WANG Yuan-xiu, LIU Fan, GUO Kai-yang, LIU Guo-qin Subtropical Plant Science    2023, 52 (5): 369-380.   DOI: 10.3969/j.issn.1009-7791.2023.05.001 Abstract （125）      PDF（pc） （6086KB）（1208）       Knowledge map    Save The effects of strigolactone (SL) on the elongation of tobacco axillary buds and the expression of genes related to its metabolic pathway were carried out, to explore the relationship between SL and the growth of tobacco axillary buds and the expression changes of SL-related genes during the elongation of tobacco axillary buds, which could establish a theoretical basis for the molecular regulation mechanism of SL in regulating the growth of tobacco axillary buds. This study investigated the developmental changes of tobacco axillary meristematic tissues after decapitation, and observed the various genes associated with SL metabolic pathway of tobacco axillary buds by treatment with GR24, an artificial synthetic analogue of SLs, using paraffin sectioning and transcriptome technique. The results showed that the axillary meristem of tobacco was composed of three cell regions: central blast region (CM), peripheral meristem (PM) and costal meristem (RM), among which the CM was located at the top of the axillary meristem, which could form PM and RM through the division of basal and lateral cells, the PM was located on both sides of the axillary meristem, and the RM was located below the CM region and the inner side of the PM region. The cell volume and arrangement of the three cell regions were different, indicating that there were differences in cell division in each part of the meristem. After axillary meristem development to form axillary buds, it was found that GR24 could inhibit the elongation of axillary buds at 1–3 nodes by exogenous application of different plant growth regulators, while BR could promote the elongation of axillary buds. Transcriptome analysis revealed that SL could affect the expression of genes related to its own metabolic pathway, SL induced the expression of D27, D14, DAD2 and SMAX1-LIKE4 compared to CK and TIS-108 [a triazole-type strigolactone(SL)-biosynthesis inhibitor] treatment, whereas, D27, D14 and DAD2 were down-regulated by TIS-108 treatment, the expression of SMAX1 was inhibited by SL, while TIS-108 treatment induced the expression of SMAX1. The axillary buds of tobacco are developed from three hyphal regions of the axillary meristem, while different plant growth regulators have different effects on the axillary buds of tobacco. BR can promote the elongation of the axillary buds of tobacco, while SL can inhibit the elongation of the axillary buds, and the genes related to the metabolic pathway may play an important regulatory role in the elongation of the axillary buds of tobacco. Reference | Related Articles | Metrics | Comments（0）

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Studies on Diversity of Lycophytes and Ferns in the Chebaling National Nature Reserve, Guangdong Province ZHANG Ying-ming, WANG Ting, DENG Shuang-wen, CUI Yu-wen, TAN Hai-rong, CHEN Hong-feng Subtropical Plant Science    2024, 53 (3): 243-256.   DOI: 10.3969/j.issn.1009-7791.2024.03.008 Abstract （129）      PDF（pc） （5121KB）（1170）       Knowledge map    Save In order to comprehensively document the plant diversity within the Chebaling National Nature Reserve in Guangdong and to provide data support for the long-term monitoring, conservation management, and public education regarding biodiversity within the reserve, we conducted field surveys and specimen collection of ferns and lycophytes using transect methods from June to August 2023. A statistical analysis of the species composition, floristic characteristics, and resource status of ferns and lycophytes within the reserve was carried out by integrating literature data. The results indicated: (1) A total of 231 species (including infraspecific taxa) of ferns and lycophytes belonging to 75 genera and 25 families distributed in the nature reserve, among them 64 species from 11 families and 28 genera were new records in the area. (2) There were six monotypic families and 38 monotypic genera, accounting for 24.00% and 50.67% of the total families and genera, respectively, which reflected the ancient and primitive nature of the ferns and lycophytes flora in the area. (3) Ferns and lycophytes composition in this area are derived from multiple origins. The tropical component ranked at the family (60.00%) and genus (68.00%) levels, while at the species level, the subtropical component (54.98%) held prevalence, followed by the tropical component (29.87%). It aligns with the characteristics of subtropical flora, demonstrating a certain degree of features associated with tropical flora. (4) Compared with adjacent nature areas, Chebaling Nature Reserve shows the closest relationship with Qingyunshan Provincial Nature Reserve in Guangdong province. The similarity indices of species, genera, and families (Jaccard/Krober coefficients) stand at 92.00/96.00, 73.42/85.33, and 42.42/62.86, respectively. This suggests a probable connection to their geographical proximity and similar climatic features. (5) Within the nature area, ferns and lycophytes resources are abundant, including six edible species, 145 medicinal species, 141 ornamental species, and 32 species with industrial value. These resources provide rich opportunities for the future rational development and effective utilization of plants. Reference | Related Articles | Metrics | Comments（0）

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Landscape Evaluation of Plant Community of Bougainvillea Based on SBE Method YANG Rong, LEI Jiang-li, CAO Hua, XU Shan-shan, LU Ting Subtropical Plant Science    2023, 52 (6): 525-533.   DOI: 10.3969/j.issn.1009-7791.2023.06.009 Abstract （60）      PDF（pc） （300KB）（1104）       Knowledge map    Save To understand the main factors of landscape composition and public preference of the plant community landscape of Bougainvillea, the Bougainvillea community landscape in green space of Shenzhen were used as the research object. Twenty-five landscape samples selected randomly were evaluated by scenic beauty estimation method (SBE). The results showed that the beauty degree values of 25 community landscape samples ranged from –0.776 to 0.700. According to the correlation analysis, the factors greatly affecting the landscape beauty value of Bougainvillea were overall community harmony (X4), diversity of viewing characteristics (X5), and application characteristics of Bougainvillea (X9). The beauty degree evaluation model established by multiple linear regression, was SBE=0.425X4+0.247X5+0.503X9, which could evaluate the beauty degree of the Bougainvillea landscape more accurately. The results would provide theoretical guidance for the construction and improvement of Bougainvillea plant landscape. Reference | Related Articles | Metrics | Comments（0）

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Physiological Response of Ludisia discolor Seedlings to Drought Stress and Screening of Drought Resistance Indicators XU Li-li, MENG Xin-ya, YOU Yan-ping, SONG Xi-qiang, CHEN Yao-li, ZHONG Yun-fang Subtropical Plant Science    2024, 53 (1): 12-21.   DOI: 10.3969/j.issn.1009-7791.2024.01.002 Abstract （79）      PDF（pc） （500KB）（1098）       Knowledge map    Save In order to investigate the tolerance of Ludisia discolor to drought stress, the experiments potted water control to simulate drought were used to study the changes of growth, physiological and biochemical indicators, and bioactive components in L. discolor seedlings with around 6 months of age under different water treatments. The main response factors to drought resistance were evaluated through correlation analysis (CA) and principal component analysis (PA), which would provide some references for the water management under conservation and cultivation of L. discolor. The results showed that with the increase of drought severity, the height of L. discolor seedlings showed a downward trend compared to the control group, but there was no significant effect on stem thickness. The relative water content of leaves decreased, and the content of chloroplast pigment (Chl) first increased and then decreased, while the content of anthocyanin (ACN) showed an upward trend. Under drought stress, the activities of peroxidase (POD) and superoxide dismutase (SOD) showed a trend of first increasing and then decreasing. The contents of malondialdehyde (MDA), soluble sugar (SS), and the bioactive substances such as total flavonoids (TF), total phenols (TP), and polysaccharides (PS) all increased. Through correlation analysis and principal component analysis, it was found that MDA, SS, PS, and relative water content could be used as the preferred evaluation indicators, and in addition, stem thickness and SOD activity could be used as auxiliary indicators for drought resistance evaluation in L. discolor. In summary, the results indicated that moderate drought stress (soil moisture content 50%–55%) could promote the synthesis and accumulation of osmotic regulating substances and bioactive components of L. discolor, At the same time, to improve the quality of L. discolor, it was recommended to carry out short-term severe drought (soil moisture content 15%–20%) before harvest so that the biological activities of L. discolor could be enhanced. These findings had practical guiding significance for cultivation management. Reference | Related Articles | Metrics | Comments（0）

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Textual Research on the Basic Source of Chenpi and a Brief Introduction to the Planting History of Medicinal Material WANG Ya-rong, FAN Qiang, WU Hong, WANG Jian-song, LIAO Wen-bo Subtropical Plant Science    2023, 52 (5): 453-464.   DOI: 10.3969/j.issn.1009-7791.2023.05.011 Abstract （97）      PDF（pc） （6170KB）（835）       Knowledge map    Save Chenpi is a famous traditional Chinese medicine. Its medicinal materials are dried and mature pericarps of the Rutaceae plant Citrus reticulata Blanco and its cultivated varieties. In this paper, the source of dried tangerine peel was studied by consulting ancient herbal books and combining with the relevant research in modern times, including the source plants, origin and planting history, the analysis of effective components and efficacy, and the study of genetic relationship at the molecular level. "Guangchenpi" produced in Guangdong Province, is the best-dried tangerine peel, and "Xinhui Chenpi (C. reticulata cv. Chachiensis)" produced in Xinhui District of Guangdong Province, is the traditional authentic medicinal material in China, which is a national geographical indication product with excellent quality. The old use of orange peel began in the Liang Dynasty, flourished in Ming and Qing dynasties, and spread to modern times. The Ming Dynasty put forward that "the Chenpi produced in Guangzhong is the best" and emphasized the authenticity of Guangchenpi. There are many kinds of dried tangerine peel, and there are great differences in the content of total flavonoids. Besides hesperidin, polymethoxy brass compounds and volatile oils peculiar to Rutaceae plants can distinguish different sources of dried tangerine peel well, so it is suggested to add the next edition of China Pharmacopoeia as one of the quality control indicators. C. reticulata cv. Kinokuni, C. reticulata cv. Nian Ju, C. reticulata cv. Ponkan etc. have little difference with C. reticulata cv. Chachiensis in the content of flavonoids and polysaccharides, which can be used as effective planting resources for the dried tangerine peel. China's abundant wild citrus resources have strong resistance and adaptability to habitats, which is an important basis for breeding new varieties. Therefore, targeted protection, development, and utilization research should be strengthened. The textual research results of this paper can provide a basis for the further development and utilization of Guangchenpi and tangerine peel. Reference | Related Articles | Metrics | Comments（0）

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Species Composition and Floristic Characteristics of Eucalyptus spp. Plantations in Guangxi, South China HUO Chun-lin, ZHANG Zhong-hua, HU Cong, XU Chao-hao, HU Gang Subtropical Plant Science    2023, 52 (5): 424-432.   DOI: 10.3969/j.issn.1009-7791.2023.05.008 Abstract （125）      PDF（pc） （766KB）（819）       Knowledge map    Save Through integrating field surveys and literature data, this study analyzed the species composition and floristic characteristics of vascular plants in Eucalyptus plantation in Guangxi. The results showed that there were 584 species from 369 genera and 120 families of vascular plants in the Eucalyptus plantation of Guangxi. Among them, ferns consisted of 49 species from 28 genera and 15 families, gymnosperms included 6 species from 4 genera and 4 families, and angiosperms comprised 529 species from 337 genera and 101 families. These values account for 38.83%, 18.35%, and 6.37% of the total number of vascular plant families, genera, and species in Guangxi, respectively, indicating relatively low plant diversity in Eucalyptus plantation. Shrubs (201 species) dominated the vegetation, while lianas (91 species) were the least represented. At the family and genus level, this flora was dominated by plurimotypic families, mesotypic family, oligotypic genera and monotypic genera. The vascular plant genera and species tended to be concentrated in plurimotypic families, oligotypic genera and monotypic genera, indicating that the flora had a certain differentiation potential and the composition of families and genera was relatively scattered. The abundant primitive taxa of dominant families, genera, and species indicate that the floristic components had a certain degree of antiquity. There were a total of 14 distribution types and 15 subtypes in the genus distribution area. The ratio of tropical to temperate genera (R/T value) was 5.37, with tropical components being the main component, with pan tropical components being the most dominant. Only 2 genera and 2 species were endemic to China in the flora. Overall, the flora of Eucalyptus plantation in Guangxi exhibited complex composition, apparent tropical characteristics, ancient origins, but lacked unique elements, and had relatively low differentiation. These research findings could be utilized to guide the analysis of plant diversity and floristic characteristics in Eucalyptus plantation in Guangxi. Reference | Related Articles | Metrics | Comments（0）

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Effects of Different Concentrations of Melatonin Treatment on the Hardness and Pectin of Postharvest……… Blueberry Fruits SUN Meng-meng, TAO Le-ren Subtropical Plant Science    2023, 52 (6): 475-480.   DOI: 10.3969/j.issn.1009-7791.2023.06.002 Abstract （89）      PDF（pc） （698KB）（790）       Knowledge map    Save In response to the issues of difficult storage and decreased hardness of blueberries after picking, this experiment used blueberries as materials and treated them with different concentrations of melatonin (0, 50, 100, and 150 mg·L–1). The hardness, pectin content, pectin methylesterase (PME) activity, polygalacturonase (PG) activity, pectin lyase (PL) activity, β-galactosidase (β-GAL) activity, degree of pectin methylation, β-eliminating reaction degree, H2O2 and malondialdehyde (MDA) content were measured to explore the mechanism of melatonin's effect on blueberry fruit preservation. The results showed that different concentrations of melatonin treatment could delay the decrease of blueberry hardness, but the effect was not significant when the treatment concentration was low (50 mg·L–1). The 150 mg·L–1 melatonin treatment had the best preservation effect on blueberry fruit, maintaining pectin content and inhibiting PG, PL, PME, and β-GAL activity of cell wall degrading enzymes, reducing the demethylation of pectin. These results indicated that melatonin could delay the degradation of cell wall polysaccharides by inhibiting enzyme activity, which was feasible for post harvest preservation of blueberry fruits. Reference | Related Articles | Metrics | Comments（0）

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Technical Specification for Planting Guangchenpi (Citrus reticulata cv. Chachiensis) WANG Ya-rong, FAN Qiang, WU Hong, WANG Jian-song, LIAO Wen-bo Subtropical Plant Science    2023, 52 (6): 540-546.   DOI: 10.3969/j.issn.1009-7791.2023.06.011 Abstract （63）      PDF（pc） （461KB）（739）       Knowledge map    Save Citrus reticulata cv. Chachiensis is an important genuine medicinal material in China, mainly produced in Xinhui District, Guangdong Province. Standardized cultivation will provide technical support for the sustainable development of this medicinal material. According to the technical measures of planting C. reticulata cv. Chachiensis in different ecological areas in Xinhui District from 2006 to 2023, combined with the field investigation of Guangdong Southern Medicine (Guangchenpi) industrial technology system innovation team from 2019 to 2023, this paper summarized the planting varieties, production environment, seedling production, field planting, pest control, fruit picking, and other aspects, and formulated this standardized planting technical standard. Reference | Related Articles | Metrics | Comments（0）

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Characteristics of Population Structure and Growth Status of Syzygium tephrodes in Jianfengling Tropical Rainforest, Hainan, China XIA Lian, XU Han, LI Yan-peng, QIN Wen-hao Subtropical Plant Science    2024, 53 (1): 46-52.   DOI: 10.3969/j.issn.1009-7791.2024.01.006 Abstract （69）      PDF（pc） （615KB）（720）       Knowledge map    Save In this study, we took Syzygium tephrodes as the object in a 60 hm2 large sample plot in Jianfengling, Hainan, and investigated the structural characteristics and growth dynamics of its population, as well as the intensity of inter-plant competition and its distribution pattern. The results showed that: (1) S. tephrodes populations have strong natural renewal ability, abundant seedlings, and the mortality rate of the populations increased or decreased with the increase of the diameter level and then decreased rapidly at the Ⅳ stage, and the fluctuation amplitude was the most obvious at the Ⅳ–Ⅴ diameter level, and the mortality rate declined rapidly after the Ⅳ level and tended to be stabilized. (2) The survival curves of S. tephrodes were of Deevey-Ⅲ type, the mortality rate was high in the early stage, and low once it reached a certain age. (3) The results of the time series prediction showed that the number of individuals in each age class increased to different degrees after the next 2, 4 and 6 age classes. In conclusion, the mortality rate of young individuals in S. tephrodes population was high, but there was still a certain potential for renewal. This study provided theoretical support for the landscaping application and protection strategy formulation of S. tephrodes. It was recommended to further strengthen habitat protection and take appropriate intervention measures to promote stable population development within the community. Reference | Related Articles | Metrics | Comments（0）

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Differences in Microbial Communities among Ganpu Tea from Different Years HONG Pei-yu, WANG Ya-yu, WU Hong Subtropical Plant Science    2024, 53 (3): 191-200.   DOI: 10.3969/j.issn.1009-7791.2024.03.001 Abstract （127）      PDF（pc） （5289KB）（666）       Knowledge map    Save Ganpu tea is made by removing the flesh of fresh Citrus reticulata 'Chachiensis' and filling them with Yunnan Pu-erh tea. It has both the aroma of Pericarpium Citri Reticulatae 'Chachiensis' and the fragrance of Pu-erh tea. In this study, Ganpu teas were separated into tea leaves and peels with different aging times for microbiome analysis. It was found that the microbial composition of the peels and tea leaves of Ganpu tea was more similar in the early aging stage, while the differences became more pronounced in the later aging stage. In tea leaves of Ganpu tea aged at different times, the dominant bacterial genera included Bacillus, Staphylococcus, and Blastobotrys. In the peel of Ganpu tea aged at different times, the dominant bacteria aged for 0 to 1 year include Staphylococcus, while the dominant bacteria aged for the other three times are Acinetobacter. In the fungal community, the dominant fungal genera in aged 0, 1, and 5 year old peels, as well as five different aged Ganpu tea leaves, are all Blastobotrys. The dominant fungal genus in aged 7 and 9 year old Ganpu tea peels is Xeromyces. Among the tea leaves or peels of Ganpu tea at different aging times, the majority of samples (over 75% of the abundance) shared the same Amplicon Sequence Variants (ASVs). Correlation analysis based on these shared ASVs revealed a significant positive correlation between Aspergillus and other microorganisms in the network, although its abundance was not particularly high in Ganpu tea at different aging times. Reference | Related Articles | Metrics | Comments（0）

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Effect of Phosphorus Reduction on Growth, Yield and Quality of Astragalus membranaceus LI Cong, MAO Yao-jie, JIN Xiao-jun Subtropical Plant Science    2024, 53 (2): 128-136.   DOI: 10.3969/j.issn.1009-7791.2024.02.005 Abstract （94）      PDF（pc） （712KB）（587）       Knowledge map    Save The effects of phosphorus reduction on the growth, physiology, yield and quality of Astragalus mongolicus were studied to provide scientific basis for its fertilization and cultivation. The growth, physiology, yield and quality indexes were measured by setting 4 phosphorus application levels. Results showed that phosphorus reduction by 25% treatment (P2) had a significant effect of on growth, yield and quality of A. membranaceus. The seedling emergence rate, leaf area, root length, root diameter, fresh biomass, dry biomass, carotenoids, SOD activity, POD activity, CAT activity, economic benefit and glucosinolate of acacia catechu exhibited significantly increased by 6.76%, 3.32%, 6.76%, 18.01%, 2.13%, 3.80%, 26.00%, 7.12%, 12.04%, 3.90%, 10.72% and 13.47% respectively, compared to the full phosphorus application treatment. There were no significant differences in stem diameter, chlorophyll a, chlorophyll b, fresh yield, dry yield, drying rate, first grade rate, total ash, extract, polysaccharide and astragaloside, compared with total phosphorus application. Reference | Related Articles | Metrics | Comments（0）

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Diversity and Geographical Pattern Analysis of Wild Lamiaceae Species in China CHANG Meng-lin, CHEN Xin-yan, CHEN Shi-pin, MA Liang Subtropical Plant Science    2024, 53 (3): 234-242.   DOI: 10.3969/j.issn.1009-7791.2024.03.007 Abstract （134）      PDF（pc） （1475KB）（577）       Knowledge map    Save Based on the taxonomic database and a large amount of literature, this study takes administrative counties as the basic unit to sort out the wild Lamiaceae distributed in Chinese Mainland. The species diversity, genus flora, and distribution were analyzed, resulting in the establishment of a geographical distribution dataset for wild Lamiaceae in China. As of January 2024, 100 genera and 1,387 species (including subspecies and varieties) were recorded. Among these, only Scutellaria, a genus with more than 150 species. The genera with species numbers between 101 and 150 include Salvia with 137 species and Isodon with 106 species. Thirty-six genera contain between 6 and 50 species, totaling 733 species, representing the main component of wild Lamiaceae in China. Fifty-nine genera have 5 or fewer species, totaling 119 species, accounting for 8.58% of the total number of wild Lamiaceae species in China. Thirty-three genera are represented by only one species in China, indicating a high genus diversity but low species richness within genera. The primary genera are Scutellaria, Salvia, and Isodon, with a total of 394 species, accounting for 28.62% of the total species. Wild Lamiaceae are distributed across all provinces, autonomous regions, and municipalities in China, primarily in the eastern Himalayas, the mountains of western Hubei and eastern Chongqing, southeastern Tibet-northwestern Yunnan, and the mountains of eastern Yunnan-western Guangxi. The highest species richness is found in Yunnan Province (658 species) and Sichuan Province (532 species). The flora of the genus was diverse. According to Wu Zhengyi's classification of the distribution areas of Chinese seed plant genera, the 100 genera of wild Lamiaceae in China belong to 15 typical types and 12 variant types. Tropical and temperate floristic elements dominate. Genera related to tropical flora account for 39 genera and 548 species, showing a significant predominance. Temperate elements follow, with six genera exhibiting a Mediterranean distribution and two genera exhibiting disjunct distributions between East Asia and North America. Wild Lamiaceae in China are functionally diverse, mainly categorized into medicinal plants, aromatic plants, nectar plants, wild vegetables, ornamental plants, and oil plants. Although some Lamiaceae groups have been explored for their value, many groups remain under-researched, warranting further mechanism research and utilization. Reference | Related Articles | Metrics | Comments（0）

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Photosynthetic Characteristics and Photosynthetic Carbon Sequestration and Oxygen Release Capacity of 11 Mangrove Species ZHANG Liu, ZHAN Qiao-si, GUO Wei, LAI Can, YANG Qiong, ZHANG Hui Subtropical Plant Science    2023, 52 (6): 465-474.   DOI: 10.3969/j.issn.1009-7791.2023.06.001 Abstract （116）      PDF（pc） （880KB）（577）       Knowledge map    Save Mangrove forest is an important part of the global carbon cycle, and the study of the photosynthetic characteristics of different mangrove plants and the difference in carbon sequestration and oxygen release capacity is an important basis for the cumulative assessment and protection and restoration of carbon pool of mangrove biomass. The daily dynamics of photosynthesis rate of mangrove trees and leaf area index were determined by using Li-6800 Portable Photosynthesizer and TOP-1300 Canopy Analyzer, to analyze the daily capacity of carbon sequestration and oxygen release of the target species. Carbon sequestration per unit land area was used as a measure of the CO2 absorption capacity of mangrove plants for cluster analysis to further analyze the main factors affecting the oxygen sequestration capacity of plants. The results showed that: (1) The net photosynthetic rate of six species was unimodal curve, including Cerbera manghas, Kandelia obovata, Heritiera littoralis, Acanthus ilicifolius, Hibiscus hamabo and Volkameria inermis, and the remaining five species showed a bimodal curve due to photosynthetic lunch break, among which Cerbera manghas was the lowest and Volkameria inermis was the highest. (2) In terms of carbon sequestration and oxygen release capacity per unit land area, 3 species of shrubs (Acanthus ilicifolius, Hibiscus hamabo, Volkameria inermis ) and 4 species of trees (Aegiceras corniculatum, Excoecaria agallocha, Heritiera littoralis, Sonneratia apetala ) performed better. (3) The results of the clustering of daily carbon sequestration per unit land area of 11 mangrove species were divided into three categories, the first category included Hibiscus hamabo and Volkameria inermis with the highest daily carbon sequestration, the second category was Aegiceras corniculatum, Excoecaria agallocha, Heritiera littoralis, Acanthus ilicifolius and Sonneratia apetala with medium daily carbon sequestration, and the third category was Cerbera manghas, Thespesia populnea, Bruguiera gymnorhiza and Kandelia obovata with the lowest daily carbon sequestration. (4) The main influencing factors of daily carbon sequestration and oxygen release per unit land leaf area were transpiration rate (Tr) and stomatal conductance (Gs). Reference | Related Articles | Metrics | Comments（0）

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Dynamics of Forest Carbon Density in Xiangtoushan National Nature Reserve, Guangdong Province KANG Ning, ZHANG Yue, CHEN Yu, DONG Jing-li, ZENG Yan-na, ZHANG Yun-ling, YANG Shi-min, MEI Qi-ming Subtropical Plant Science    2024, 53 (3): 227-233.   DOI: 10.3969/j.issn.1009-7791.2024.03.006 Abstract （81）      PDF（pc） （651KB）（520）       Knowledge map    Save In order to study the dynamics of carbon density of typical forest communities in Xiangtoushan National Nature Reserve in Guangdong province (XTSNR), five 1-hm2 forest ecosystem monitoring plots were constructed according to the vegetation type and age of the forest in XTSNR. The second censuses of the plots were conducted 5 years after the construction of the plots to analyze the changes of individual species, important values and carbon density within the plots. The results showed that: (1) With the natural restoration of the XTSNR forest, the individual density of the five plots increased significantly, and the individual density of the XTS-D plot increased the most (2356 plants·hm–2), while that of the XTS-E plot of the coniferous and broad-leaved mixed forest increased the least (228 plants·hm–2). (2) Compared with the initial census, the carbon density of XTS-A, XTS-B, XTS-C and XTS-D plots all increased, and the newly added carbon storage of mature forest XTS-D plots was the highest, with an increase of 22.41%. The carbon density of XTS-E mixed forest decreased by 9.23%. (3) The DBH class structures were different among the five plots; the middle DBH class (Ⅳ and V) contributed the most to the carbon storage of the mature forest XTS-A sample; large DBH class (Ⅸ) had the highest carbon storage in overmature forest XTS-B; the carbon storage of young and middle-aged trees (XTS-C and XTS-D) was mainly concentrated in trees of middle and small DBH classes (Ⅱ-Ⅳ). (5) The top 10 species of carbon density in the five plots were basically the same. Although Pinus massoniana in XTS-E plot was still a tree with high carbon density and important value, its individual number and important value decreased. Among the five plots, broad-leaved tree species showed the fastest increase in carbon density. Reference | Related Articles | Metrics | Comments（0）

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Deproteinization Methods of Crude Polysaccharide from Seeds of Livistona chinensis and Its Inhibitory Activity on Osteoclast Differentiation LIU Qiu, LIU Jia-quan, WU Jing-yu, RAN Heng-xing, WU Zheng-rong, JIN Jing-wei Subtropical Plant Science    2024, 53 (3): 201-206.   DOI: 10.3969/j.issn.1009-7791.2024.03.002 Abstract （101）      PDF（pc） （2862KB）（462）       Knowledge map    Save This study primarily aimed to explore the optimal protein removal method for polysaccharide of the seed of Livistona chinensis. Using protein clearance rate and polysaccharide retention rate as evaluation indicators, the effects of Sevage method, enzymatic method, and the combination of enzyme and Sevage method on the protein removal from polysaccharide of the seeds were investigated. Additionally, the influence of the obtained polysaccharide of the seeds on RANKL-induced osteoclast differentiation in RAW264.7 cells was explored. The protein removal rates of polysaccharide of the seed using the Sevage method, enzymatic method, and the combined method were 78.85%, 82.40%, and 82.73%, respectively. The polysaccharide retention rates were 72.42%, 92.16%, and 96.72%, respectively. Treatment of RANKL-induced RAW264.7 osteoclast models with polysaccharide of the seed of L. chinensis obtained using the optimal protein removal method revealed that it could reduce the number of osteoclasts generated and decrease their TRAP activity. Therefore, the combination of enzyme and Sevage for protein removal was a relatively effective method that could significantly reduce the protein content in polysaccharide of L. chinensis seed while maintaining a high polysaccharide retention rate. The obtained polysaccharide could also inhibit RANKL-induced osteoclast differentiation in RAW264.7 cells, providing theoretical support for the development of new anti-osteoporosis drugs. Reference | Related Articles | Metrics | Comments（0）

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Mitigation Effect of Naphthalene Acetic Acid on Allium cepa Roots Under Copper Stress FU Xian-liang, LI Wei, GUO Hai-bin, ZHANG Xue-lian, LI Huai-yuan, LI Nan Subtropical Plant Science    2023, 52 (6): 481-486.   DOI: 10.3969/j.issn.1009-7791.2023.06.003 Abstract （46）      PDF（pc） （389KB）（437）       Knowledge map    Save The onion root tip was treated with different concentrations of naphthalene acetic acid (NAA) based on 3 μmol·L–1 copper sulfate solution by hydroponics to explore the alleviation effect of NAA on copper stress. The results showed that 3 μmol·L–1 copper sulfate solution significantly inhibited the onion root growth. The combined treatment of 3 μmol·L–1 copper sulfate solution and 1 μmol·L–1 NAA showed double inhibition and increased SOD activity and MDA content of the roots. While the mitotic index of root tip cells decreased significantly, and the aberration rate increased. The treatment with 10–2 or 10–4 μmol·L–1 NAA significantly promoted the growth of onion roots. Under the co-treatment of 3 μmol·L–1 copper sulfate solution and 10–2 μmol·L–1 NAA, NAA significantly alleviated the copper stress on onion roots, and the onion root growth returned to the control level. Compared with 3 μmol·L–1 copper sulfate solution stress, it was found that this treatment significantly increased the mitotic index, and reduced the aberration rate, SOD activity, and MDA content. It was indicated that NAA at appropriate concentrations significantly alleviated the copper stress on root system. Reference | Related Articles | Metrics | Comments（0）

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Research Progress on the Application of Slightly Acidic Electrolyzed Water in Food Preservation DAI Xiao-ze, WANG Chao, LIU Qing-qing, FENG Shu-juan, MING Yan-lin, LIN Ming-you, ZHANG Yan-hui, LIN He-tong, CHEN Yi-hui Subtropical Plant Science    2025, 54 (1): 89-99.   DOI: 10.3969/j.issn.1009-7791.2025.01.012 Abstract （21）      PDF（pc） （1224KB）（337）       Knowledge map    Save Slightly acidic electrolyzed water (SAEW), as an environmentally friendly sanitizer, exhibits characteristics such as low cost, high efficiency, robust environmental protection, strong safety, and non-corrosiveness, which have led to its widespread application in food sterilization and preservation. This paper delves into the preparation principle, key parameters, sterilization mechanism, and application advantages of SAEW. Additionally, it compiles the latest advancements made by scholars globally in recent years concerning the use of SAEW in sterilizing and preserving a variety of foods, including fruits and vegetables, aquatic products, livestock meats, and poultry meats. Furthermore, the paper outlines potential future research directions and breakthroughs in SAEW technology, aiming to serve as a reference for broadening the application scope of SAEW within the food industry. Reference | Related Articles | Metrics | Comments（0）

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Effects of Soil Amendments on Soil Environment and Baby Bok Choy Quality WEI Jin-yi, WANG Ming-yuan, TANG Yi, WANG Zi-shu, YANG Chen-yi Subtropical Plant Science    2024, 53 (1): 40-45.   DOI: 10.3969/j.issn.1009-7791.2024.01.005 Abstract （92）      PDF（pc） （642KB）（325）       Knowledge map    Save In order to explore the effects of soil amendments on the soil environment, quality and yield of the Baby Bok Choy, the soil amendments developed by our laboratory were used as materials, and soil pH, organic matter content and the internal and external quality of ‘Xiaobaimiao’ cabbage were studied. Four treatments were designed as follows: no soil amendments (CK), and application of the soil amendments 25 kg (B25), 50 kg (B50) and 75 kg (B75) per 667 m2 of vegetable garden. The results showed that the application of soil amendments could maintain soil pH 7.0 above and improve soil acidification. The organic matter content in different soil layers decreased with the deepening of the soil layer. In the soil layer of 31–45 cm, the highest organic matter content was observed in the B25 treatment, which was 5.35 g·kg–1, significantly higher than that in the CK group (P<0.05); soil amendments could increase the content of Vᴄ, soluble protein, and free amino acids in the Baby Bok Choy, while reducing nitrate content. Among them, under B75 treatment, the content of Vᴄ, soluble protein, and free amino acids was the highest, significantly different from the CK group (P<0.05), and the nitrate content was the lowest, 0.4713 mg·g–1, significantly different from other treatments (P<0.05). Moderate application of soil amendments could increase the length, width, and number of leaves of the Baby Bok Choy, and improve its external quality. Under B25 and B50 treatments, the fresh weight of the Baby Bok Choy above ground increased by 79 g and 16 g compared to the CK group, respectively, with significant differences (P<0.05). The application of soil amendments can improve the yield and quality of the Baby Bok Choy, and improve the soil environment. Reference | Related Articles | Metrics | Comments（0）

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Eight Newly Recorded Species of Pteridophytes from Fujian Province FU Hou-hua, WEI Hong-jin, CHEN Shuai, SHEN Jun, MA Liang, CHEN Shi-pin Subtropical Plant Science    2024, 53 (3): 271-275.   DOI: 10.3969/j.issn.1009-7791.2024.03.010 Abstract （63）      PDF（pc） （7075KB）（308）       Knowledge map    Save Through field investigations and specimen references, six species, one variety and one hybrid of pteridophytes belonging to six genera in three families were found as new records in Fujian province, viz., Arachniodes simulans (Ching) Ching, A. nigrospinosa (Ching) Ching, A. miqueliana (Maxim. ex Franch. et Sav.) Ohwi, Bolbitis × laxireticulata K. Iwats., Hymenasplenium murakami-hatanakae Nakaike, Asplenium tenuicaule var. subvarians (Ching) Viane, Metathelypteris uraiensis (Rosenst.) Ching and Phegopteris connectilis (Michx.) Watt. Reference | Related Articles | Metrics | Comments（0）

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Estimation of Genome Sizes of Pistacia chinensis by Flow Cytometry and Genome Survey ZHOU Mei-jun, YIN Yue, ZHANG Yong-hong Subtropical Plant Science    2024, 53 (6): 495-502.   DOI: 10.3969/j.issn.1009-7791.2024.06.001 Abstract （80）      PDF（pc） （4084KB）（306）       Knowledge map    Save Pistacia chinensis, a deciduous tree of the genus Pistacia (Anacardiaceae), is an important oil plant resource for its seeds being rich in oil. It has value in wood production and landscape too. Until now, no relevant information on the whole genome of P. chinensis has been found, which limits its resource utilization and germplasm innovation. To determine the whole genome sequencing strategy of P. chinensis, flow cytometry combined with high-throughput sequencing technology was employed to estimate the genome size of this species. The results were as follows: (1) The genome sizes of P. chinensis were estimated to be approximately 480 Mb and 406 Mb by flow cytometry using Solanum lycopersicum and Arabidopsis thaliana as internal references, respectively. (2) 86 Gb of raw data were produced in next-generation sequencing and approximately 85 Gb of clean data were obtained after filtering. (3) NT database comparison found no exogenous pollution in the sequencing data, with five most math species belonging to Anacardiaceae. Pistacia vera, a congeneric species, had the highest sequence similarity with P. chinensis. (4) K-mer analysis showed that the genome size of P. chinensis was 418 Mb with a heterozygosity level of 1.89% and repetitive sequences ratio of 57.5%. The results revealed that the genome of P. chinensis was a complex genome with high heterozygosity and repetitive rates. It is recommended to combine PacBio sequencing technology and Hi-C sequencing in genome assembling with specific concern on heterozygous regions. This study provides valuable reference and important database for the genomics of P. chinensis. Reference | Related Articles | Metrics | Comments（0）

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New Data of Salvia from Zhejiang Province LI Jun-ping, ZHANG Pei-lin, ZHONG Jian-ping, ZHU Yi-rong, XU Liang-dong, ZHU Hao-dong, XIE Wen-yuan Subtropical Plant Science    2024, 53 (1): 60-63.   DOI: 10.3969/j.issn.1009-7791.2024.01.008 Abstract （87）      PDF（pc） （276KB）（291）       Knowledge map    Save The classification below Salvia sinica Migo (Lamiaceae) was studied in this paper. The form rake of S. sinica f. purpurea H. W. Li was restored, and S. sinica f. flaviflora J. P. Li, Y. R. Zhu et Z. H. Chen, as a new form from Zhejiang Province was reported. The voucher specimens were deposited in Zhejiang Museum of Natural History (ZM). Reference | Related Articles | Metrics | Comments（0）

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Induction of Callus and Adventitious Buds of Garcinia xanthochymus Seeds YANG Lan, AN Xue-jiao, CHEN Li-gang, WEN Bin Subtropical Plant Science    2024, 53 (3): 207-213.   DOI: 10.3969/j.issn.1009-7791.2024.03.003 Abstract （80）      PDF（pc） （1516KB）（259）       Knowledge map    Save Garcinia xanthochymus seeds exhibit the characteristic of totipotent germination, yet therein physiological basis remains unclear. To investigate the regenerative growth characteristics, explants from mature and immature seeds of G. xanthochymus were utilized to examine the impacts of five hormones and growth regulators (NAA, TDZ, IAA, 6-BA, and 2,4-D) on callus induction and adventitious bud formation, with MS as basic media. The results indicated that: (1) Callus formation primarily depended on the maturity of the seeds. Explants derived from mature seeds exhibited induction rates exceeding 80% even without exogenous growth regulators, while explants sourced from immature seeds only responded to TDZ (0.25–3 mg·L–1) and 6-BA (1.5–2 mg·L–1) with a callus induction rate below 40%. (2) Only 6-BA induced adventitious buds steadily in this study, with the optimal approach being the cultivation of explants from mature seeds on MS medium supplemented with 5.5 mg·L–1 6-BA, resulting in a 73% incidence rate and an average of 5.07 adventitious shoots each explant. These findings further validated the strong regenerative growth potential of G. xanthochymus seeds, and the investigated plantlet regeneration protocol provided a reliable method for asexual propagation in G. xanthochymus. Reference | Related Articles | Metrics | Comments（0）

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Four Newly Recorded Species of Orchidaceae in Qinghai Province RAO Wen-hui, WANG Mei-na, CHEN Jian-bin, ZHANG De-ning, LI Jian, KONG De-min, WU Xin-yi, ZHANG Cheng, ZHANG Sheng-bang Subtropical Plant Science    2024, 53 (4): 373-376.   DOI: 10.3969/j.issn.1009-7791.2024.04.011 Abstract （88）      PDF（pc） （9036KB）（252）       Knowledge map    Save This paper reported four newly recorded species of Orchidaceae in Qinghai, China, including Gymnadenia conopsea (L.) R. Br., Neottia puberula var. maculata (Tang & F. T. Wang) S. C. Chen, S. W. Gale & P. J. Cribb, Platanthera minutiflora Schlechter, Platanthera urceolata (Hook. f.) R. M. Bateman. These new records have enriched the diversity of Orchidaceae in Qinghai province, and have certain significance to the study of flora in the future. Reference | Related Articles | Metrics | Comments（0）

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Genome Survey Analysis in Ixora chinensis TU Shao-qiang, KE Ling-jun, CAI Yue-qin, LU Luan-mei, YU Hui-wen Subtropical Plant Science    2024, 53 (3): 214-219.   DOI: 10.3969/j.issn.1009-7791.2024.03.004 Abstract （98）      PDF（pc） （2572KB）（251）       Knowledge map    Save Ixora chinensis is a traditional Chinese medicinal herb with both medicinal and ornamental values. The analysis of the genomic characteristics of I. chinensis can lay a theoretical basis for sequencing the whole genome and elucidating the molecular mechanism of biosynthesis of medicinal components. The genomic information of I. chinensis was evaluated by using Survey genome sequencing technology and K-mer analysis to obtain information on genomic duplications, heterozygosity and GC content. Results were as follows. Survey high-throughput sequencing obtained Raw Data 47.63 Gb, filtered Clean data 45.62 Gb. K-mer analysis showed that the genome size was 588.35 Mb, heterozygosity was 1.5598%, repeatability was 64.49%, GC content was 35.71%. The genome of I. chinensis presents high heterozygosity, high repetition, and genome bulky features. Reference | Related Articles | Metrics | Comments（0）

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Mechanism of Traditional Chinese Medicine Genkwa Flos for Treatment of Primary Dysmenorrhea Based on Network Pharmacology and Molecular Docking LI Si-meng, TIAN Rong, YIN Ming-jing, GU Wei Subtropical Plant Science    2024, 53 (1): 31-39.   DOI: 10.3969/j.issn.1009-7791.2024.01.004 Abstract （86）      PDF（pc） （470KB）（234）       Knowledge map    Save The effective material basis and potential mechanism of Genkwa Flos in treating primary dysmenorrhea by network pharmacology and molecular docking techniques were studied. Based on the TCMSP database, the active substances and targets of Genkwa Flos were predicted, and the targets related to primary dysmenorrhea were obtained with the help of DisGeNET and other databases. Based on the intersection targets of Genkwa Flos and primary dysmenorrhea, the intersection target protein interaction network was constructed using the STRING database, and the “Genkwa Flos-active substances-target-primary dysmenorrhea” network was constructed using Cytoscape3.7.2. Gene ontology (GO) and Kyoto encyclopedia of genes and genomes (KEGG) pathway enrichment analysis were performed using the DAVID database, and molecular docking of the core targets and corresponding active ingredients was performed using Autodock tools. Results showed that the core active substances of Genkwa Flos for treating primary dysmenorrhea are Genkwanin, (2R)-5,7-dihydroxy-2- (4-hydroxyphenyl) chroman-4-one, 7-hydroxy-6-methoxy-3,7’-dicoumarin, Gentiacaulein, Hydroxygenkwanin, kaempferol, luteolin, sitosterol, 9-hydroxyglabratolide; key targets include ESR1, PTGS1, PTGS2, GSTM1, CYP1A1, OPRM1, NTRK2 and NR1H2; the associated biological processes are mainly related to aging, positive regulation of nitric oxide biosynthetic process, cytoplasm and ATPase binding; thepathway of KEGG are mainly enriched in the pathogenesis of cancer, chemical carcinogenesis-receptor activation, and chemical carcinogenesis- DNA adducts. In addition, molecular docking shows that the docking energy values between the core active ingredient Genkwanin and the key target proteins are all less than –7.0 kcal·mol–1, which have strong binding activity and can form stable structural conformations. This study used network pharmacology and molecular docking methods to preliminarily explore the active material basis of Genkwa Flos for treating primary dysmenorrhea from the perspective of “Chinese medicine-ingredient-target-disease”, laying a foundation for further studying the mechanism of action of this kind of ingredients for treating dysmenorrhea. Reference | Related Articles | Metrics | Comments（0）

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Diversity of Understory Herbaceous Plants in Urban Forest Communities and Their Environmental Responses —the Case of Guiyang City CAI Hong-li, OU Jing Subtropical Plant Science    2023, 52 (5): 434-447.   DOI: 10.3969/j.issn.1009-7791.2023.05.009 Abstract （96）      PDF（pc） （3252KB）（224）       Knowledge map    Save Understory herbaceous plants are an important component of forest communities, and are important for maintaining the function and diversity of forest ecosystems. This study analyzed the relationship between the composition and diversity of herbaceous plants and environmental factors based on the data from 1320 understory samples (1 m×1 m) from 44 typical forest community sample plots in Guiyang City. The results showed that (1) there were 257 species of understory herbaceous plants in the study area, belonging to 186 genera in 67 families, including 226 species of seed plants, with perennial herbs as the dominant taxa (69%). Asteraceae, Gramineae, Liliaceae and Labiatae dominated. (2) A total of eight environmental factors explained 20.2% of the variation in the composition of understory herbaceous plants in Guiyang City, and stand type and elevation were the main environmental factors affecting species composition and distribution. (3) The diversity of understory herbaceous plants in different stand types was, in descending order, mixed coniferous-broadleaf forests, mixed broadleaf forests, broadleaf-only forests, mixed coniferous forests, and coniferous-only forests. The Margalef index was significantly correlated with stand type and slope direction. The Shannon-Wiener index was significantly correlated with stand type, apomictic thickness, slope direction, and slope elevation. And the Simpson index, Pielou index were significantly correlated with stand type, apoplastic thickness, and slope position. (4) Multiple regression equations showed that Margalef index was mainly affected by stand type and slope direction, Shannon-Wiener index was mainly affected by stand type, Simpson index was mainly affected by stand type and slope position, and Pielou index was mainly affected by apomictic thickness, slope position and elevation. Therefore, the joint effect of stand type, apoplastic thickness, slope direction, slope position and elevation could better explain the variation of understory herbaceous plant species diversity in the study area. Reference | Related Articles | Metrics | Comments（0）

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Effects of Two Kinds of Modification and Fresh Extracts Soaking Treatments on the Properties of Pueraria Starch MA Yu-qi, MAN Jian-min Subtropical Plant Science    2023, 52 (5): 391-397.   DOI: 10.3969/j.issn.1009-7791.2023.05.003 Abstract （52）      PDF（pc） （579KB）（224）       Knowledge map    Save Pueraria starch were prepared by extracting and enzymatic modification or annealing, then blending and soaking the modified starch with the fresh extract produced during the extraction process. The physical and chemical properties of Pueraria starch treated with two modified soaking methods were compared. The results showed that the content of amylose in the starch was decreased, the solubility and water absorption index were increased, and the blending property was improved by the two modified soaking treatments. The two treatment methods also increased the initial temperature (T0), peak temperature (Tp), and final temperature (Tc) of Pueraria starch, and reduced the gelatinization temperature range (ΔT) and enthalpy value(ΔH), which indicated that the modified Pueraria starch was more stable to low temperature conditions and more prone to gelatinization under high temperature conditions. Both treatments significantly increased the content of Puerarin in Pueraria starch. And the digestive characteristics were characterized by a decrease in the content of fast digestible starch (RDS), while an increase in the content of slow digestible starch (SDS), which indicated that two modified soaking methods of Pueraria starch would have a positive effect on increasing satiety, reducing blood sugar, and protecting intestinal health. Reference | Related Articles | Metrics | Comments（0）

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Genome-wide Identification and Tissue Expression Analysis of the KNOX Gene Family in Altingia chinensis WANG An-bang, YE Xing-zhuang, ZHAO Jin-tao, CHEN Zhi-yun, WENG Hui-ying, LIN Mao, ZHANG Guo-fang Subtropical Plant Science    2025, 54 (1): 1-10.   DOI: 10.3969/j.issn.1009-7791.2025.01.001 Abstract （35）      PDF（pc） （2586KB）（209）       Knowledge map    Save The KNOX gene family has important regulatory functions in leaf-shape growth and development in plants. This paper aims to analyze the KNOX gene family of Altingia chinensis and explore its tissue expression pattern. We used bioinformatics methods to identify and study AcKNOXs at the whole genome level of A. chinensis, and analyzed the gene location, gene structure, phyloevolutionary relationships, gene collinearity and the transcriptome expression. We identified 11 AcKNOXs from 8 chromosomes in the A. chinensis genome. Among them, AcKNOX6 and AcKNOX9 lack ELK and Homeobox KN domains, AcKNOX7 lacks ELK domain, the others have four conserved domains: KNOX 1, KNOX 2, ELK and Homeobox KN. 11 AcKNOXs are classified into Class Ⅰ (AcKNOX1, AcKNOX2, AcKNOX5, AcKNOX8, AcKNOX10, AcKNOX11), Class Ⅱ (AcKNOX3, AcKNOX4, AcKNOX7) and Class M (AcKNOX6, AcKNOX9). The AcKNOXs protein contains 144 to 444 amino acids. They were all located in the nucleus and are all acidic, unstable and hydrophilic. Through the expression pattern analysis, we found that AcKNOXs genes have tissue specificity. The majority of the members of the same subfamily showed the similar expression pattern. The main amplification mode of 11 AcKNOXs were segmental duplication, no tandem repeats were found. There were four pairs of genes with collinearity, AcKNOX3/AcKNOX4, KNOX2/AcKNOX8, AcKNOX6/AcKNOX9, and AcKNOX5/AcKNOX10, respectively. The results of this research provide the study of KNOX gene family with scientific basis, which help to do in-depth study on the genomic characteristics. Reference | Related Articles | Metrics | Comments（0）

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Study on the Spatial Distribution Pattern and Potential Distribution Area of National Key Protected Wild Plants in Shennongjia Forest Area CHEN Wei, LI Chu-ting, FU Qiang, LIU Xiu-qun Subtropical Plant Science    2025, 54 (1): 71-81.   DOI: 10.3969/j.issn.1009-7791.2025.01.009 Abstract （20）      PDF（pc） （3788KB）（200）       Knowledge map    Save In this study, according to the Ministry of Ecology and Environment’s Technical Regulations for Investigation and Evaluation of Terrestrial Higher Plant Diversity in County Areas, the whole Shennongjia Forest Area was divided into 37 working grids (10 km × 10 km), and the spatial distribution pattern, protection status and potential distribution area of national key protected wild plants in the forest area were analyzed. The study found that: (1) There are 84 species (including varieties) of national key protected plants in Shennongjia Forest Area, including 7 species (including varieties) of national first-level key protected plants and 77 species (including varieties) of national second-level key protected plants. There are 79 species (including varieties) which have detailed distribution information. Among them, at the family level, Orchidaceae have the most species. At the genus level, Paris has the most species, and the life form of plants is mostly herbaceous. (2) In the analysis of horizontal distribution pattern, the number of national key protected plant species in grid 31 (Guanmen Mountain, Xiangxiyuan ) is the largest, which may be related to its location in the middle and high mountain areas with large fluctuations and in the Daba Mountains. (3) In the analysis of vertical distribution pattern, Middle-altitude forest belt ( 1200 m≤alt≤2300 m ) had the highest species richness, with a total of 67 species (including varieties) of national key protected plants, belonging to 45 genera in 29 families. (4) Screening out the hot spot area for 31 and 32 grids, both in Shennongjia National Park, indicating that the hot spot area is basically fully protected, and there is no protection vacancy in the hot spot area. There are 54 species (including varieties) of national key protected wild plants in Shennongjia National Park, with an in-situ protection rate of 64.29%. (5) Seven kinds of typical national key protected wild plants were screened out, and their current potential distribution areas were predicted. The potential distribution areas were mainly in the three areas of Hongping Town, Muyu Town and Dajiuhu Lake. Xinhua Town and Yangri Town also have some potential distribution areas, while there are basically no suitable areas in the northeast part of Shennongjia Forest Area. Among the seven national key protected wild plants, Taxus chinensis has the largest potential distribution area in Shennongjia Forest Area, accounting for 87.02% of the total area of Shennongjia Forest Area, and the area of high suitable area is 1562.50 km2. Reference | Related Articles | Metrics | Comments（0）

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Comprehensive Evaluation of Cold Resistance of 12 Grape Rootstock Cultivars Branches CHANG Qiang, ZHU Yan-fang, GAO Bo, HAO Yan Subtropical Plant Science    2024, 53 (2): 137-142.   DOI: 10.3969/j.issn.1009-7791.2024.02.006 Abstract （80）      PDF（pc） （856KB）（187）       Knowledge map    Save In order to provide scientific basis for the introduction of excellent cold-resistant rootstocks in Gansu, the branches of 12 grape rootstock varieties treated with artificial simulated low temperature were used as test materials, and the relative conductivity, proline, malondialdehyde, soluble sugar and soluble protein contents of the branches were determined. The relative conductivity combined with the Logistic equation was used to predict the half-lethal temperature (LT50) of each variety, and the subordinate function method was applied to make a comprehensive evaluation of the cold resistance of grape rootstocks. The results showed that the relative conductivity, soluble protein, soluble sugar, malondialdehyde, and free proline contents of the branches of each grape rootstock increased gradually, and the calculated half-lethal temperatures (LT50) ranged from -16.32 ℃ to -24.84 ℃; and the results of the comprehensive evaluation showed that the strengths of cold resistance of 12 grape varieties rootstocks were in the order of Beda, Shanhe 2, 101-14, 5BB, 188-08, SO4, Valliant, 3309, 1103P, Du Lot, BRNo.2, 110R. Reference | Related Articles | Metrics | Comments（0）

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Morphological Characteristics and Progress of Floral Bud Differentiation in Cerasus campanulata ZHU Xuan-yi, ZHANG Yang-ting, LI Wan-ying, LIN Wei-jie, ZHAO Kai, Zhou Yu-zhen Subtropical Plant Science    2024, 53 (6): 554-559.   DOI: 10.3969/j.issn.1009-7791.2024.06.008 Abstract （61）      PDF（pc） （9974KB）（185）       Knowledge map    Save To investigate the floral bud differentiation process in different petal types of Cerasus campanulata, flower developments of three varieties were observed by paraffin sectioning method in this study, i.e. the single-petaled type Cerasus ×kanzakura ‘Praecox’, double-petaled type C. campanulata ‘Double-flowered’ and semi-double-petaled type C. kanzakura×campanulata ‘Satis in Pink’. The results demonstrated that all three varieties underwent six distinct stages of floral bud differentiation: initial differentiation period, inflorescence primordium differentiation period, sepal differentiation period, petal differentiation period, stamen differentiation period, and pistil differentiation period. During the petal and stamen differentiation stages, the three varieties showed significant regularity. The petal differentiation period progressively lengthened in the varieties ‘Praecox’, ‘Satis in Pink’, and ‘Double-flowered’, while the stamen differentiation period gradually shortened. It is believed that the formation of double flower of C. campanulata varieties mainly comes from stamen petal, which belongs to the origin of pistil and stamen. The semi-double-petaled ‘Satis in Pink’ had a floral bud differentiation cycle of 98 days, the single-petaled ‘Praecox’ took 105 days, and the double-petaled ‘Double-flowered’ required 112 days. The differentiation process in various floral forms of C. campanulata was largely similar, with stamen petalization contributing to the development of double flowers. This study provides a morphological basis for further investigation into the causes and molecular mechanisms underlying double flower formation in C. campanulata. Reference | Related Articles | Metrics | Comments（0）

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Differential Analysis of Volatile Oil Composition of Notopterygii Rhizoma et Radix from Different Origins and Habitats ZHANG Jun, LI Qian Subtropical Plant Science    2025, 54 (1): 11-21.   DOI: 10.3969/j.issn.1009-7791.2025.01.002 Abstract （25）      PDF（pc） （1648KB）（170）       Knowledge map    Save The differences in volatile oil composition of Notopterygii Rhizoma et Radix (NRR) from different origins and habitats were studied to provide scientific basis for the quality control and resource development of NRR. Twenty batches of NRR herbs from different origins and habitats were used as experimental materials to extract the volatile oil by water vapour distillation. The volatile oil yields, compositions and relative contents of Notopterygium incisum (NI) and N. franchetii (NF) were systematically analyzed by GC-MS technology. The differences in chemical composition between NI and NF were interpreted from the perspective of volatile constituents by combining with cluster analysis (HCA), principal component analysis (PCA) and orthogonal partial least squares-discriminant analysis (OPLS-DA). Results showed that the average volatile oil content of NI was higher than that of NF, whereas NF had a richer variety of volatile oil constituents. A total of 206 constituents were identified in the volatile oils from 20 batches, which were mainly hydrocarbons and alcohols. There were only 3 common constituents in 20 batches of the samples, which were all hydrocarbons. In addition, the 5 constituents with the highest contents, namely, β-pinene, (+)-α-pinene, (+)-limonene, p-mentha-1,4-diene, (-)-terpinen-4-ol were also significantly different in the different origins and habitats samples. The chemometrics analysis showed that HCA, PCA and OPLS-DA could effectively distinguish NI from NF, but could not be differentiated between samples of different habitats. A total of 23 differentiated volatile oil constituents were screened out using VIP > 1 as a judgement criterion, which can be used as an important constituent for distinguishing NI from NF. There were significant differences in the types and contents of the volatile oils of NRR from different origins, but there were no obvious differences among different habitats, indicating that origins are the dominant factors among the many factors that cause differences in the volatile compositions of NRR. The results of this study provide a theoretical basis for the the quality evaluation system of NRR. Reference | Related Articles | Metrics | Comments（0）

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Effects of Winter-spring Greenhouse Cultivation on Florescence, Growth and Contents of Main Aroma Components of Jasminum sambac YUAN Yuan, WANG Yan-na, WANG Wei, RAO Geng-hui, CHEN Qing-xi Subtropical Plant Science    2023, 52 (6): 504-510.   DOI: 10.3969/j.issn.1009-7791.2023.06.006 Abstract （43）      PDF（pc） （430KB）（170）       Knowledge map    Save In this study, the effects of winter-spring greenhouse cultivation on the florescence, crown width, plant height, bud weight, branches number, bud number and contents of four main aroma components of jasmine (Jasminum sambac). The results showed that compared with the field cultivation, the florescence of jasmine opened about 10 days earlier and had longer than 35 days, bloom phage under greenhouse cultivation. However, the crown width, the number of branches and the number of flower buds per plant increased faster in July and August, and significantly higher in August, September and October. There was no significant difference in plant height, bud weight and bud diameter between greenhouse cultivation and field cultivation. Compared with the field cultivation, the aroma substances in jasmine flower buds did not change under the greenhouse cultivation, the contents of total and main aroma components, linalool, farnesol, and benzyl acetate were not significantly different in June, August and October. These results could provide a reference for the future study on extending florescence, changing quality and increasing economic benefit through protected cultivation of Jasmine. Reference | Related Articles | Metrics | Comments（0）

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Flavonoid Biosynthetic Pathways of Bupleurum scorzonerifolium and B. chinense CHANG Pan, LI Qian Subtropical Plant Science    2025, 54 (2): 158-167.   DOI: 10.3969/j.issn.1009-7791.2025.02.005 Abstract （20）      PDF（pc） （2060KB）（160）       Knowledge map    Save The differences between Bupleurum scorzonerifolium and B. chinense and their flavonoid biosynthesis pathway were studied by method of transcriptomics and metabolomics. Mass spectrometry imaging was used to investigate the in situ accumulation patterns of the major metabolites and intermediates of flavonoids. Results showed that the two species of Bupleuri Radix differed significantly, in which the flavonoid differential metabolites were regulated by differential genes and showed extreme variability, and 52 differential metabolites such as rutin, myricetin, sakuranetin and xanthohumol were screened, as well as differences in the pattern of in situ accumulation in the root cross-section, with the phloem of B. chinense being richer in flavonoid accumulation, and B. scorzonerifolium presenting a more homogeneous distribution profile. The mechanism of flavonoid biosynthesis in two species of Bupleuri Radix was revealed, and FLS, CHI and DFR genes were hypothesised to be the key genes in flavonoid biosynthesis. Meanwhile, analysis from the perspective of spatial distribution revealed that the accumulation of flavonoids in the root cross-section showed the characteristic of expanding outwards with the pith as the centre of the circle. Reference | Related Articles | Metrics | Comments（0）

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Determination of Lactone Glycosides in Goodyera schlechtendaliana and Its Related Species from Different Habitats AO Yan-xia, FENG Feng, CHEN Hui-ling, LIANG Xiu-ting, HAN Yu, WU Jin-zhong, WU Yan-bin, WU Jian-guo Subtropical Plant Science    2023, 52 (6): 511-517.   DOI: 10.3969/j.issn.1009-7791.2023.06.007 Abstract （69）      PDF（pc） （541KB）（158）       Knowledge map    Save The contents of lactone glycosides in Goodyera schlechtendaliana and its related species from different habitat were compared in this study to provide reference for the quality control of Goodyera. By HPLC–ELSD method, ChromCore AQ C18 (3 μm, 4.6 mm×250 mm) was used as the chromatographic column, and ultrapure water was used as the mobile phase. The flow rate was 0.5 mL·min–1, the column temperature was 30 ℃, and the atomization temperature of evaporative light scattering detector was 70 ℃. The flow rate of carrier gas was 2.5 mL·min–1, and the sample volume was 5 μL. The content of lactone glycosides in 30 batches of G. schlechtendaliana and its related species from different habitat was determined. The linear ranges of goodyeroside A and kinseoside were 62.5–1500 μg·mL–1 (r=0.9995) and 62.5–1500 μg·mL–1 (r=0.9996) respectively. The RSD of precision, repeatability and stability were less than 3%, and the average recovery rates were 101.41% and 101.16% respectively. The contents of goodyeroside A in 30 batches of G. schlechtendaliana and its related species were in the range of 28.31–243.07 mg·g–1, and the average content of 134.31 mg·g–1, which was quite different (RSD= 38.40%). The contents of kinseoside in 30 batches of G. schlechtendaliana and its related species were in the range of 0–184.37 mg·g–1, and the average content of 34.50 mg·g–1, and there were also great differences (RSD=141.30%). The method was simple, rapid, stable and reproducible, with good precision and accuracy, and be used for the content analysis of lactone glycosides in G. schlechtendaliana and its related species. Reference | Related Articles | Metrics | Comments（0）

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Application of Horticultural Therapy to Improvement of College Students' Psychological Quality GUO Can-li, XIE Han, WANG Li-xian, LI Dong-ze Subtropical Plant Science    2024, 53 (1): 72-79.   DOI: 10.3969/j.issn.1009-7791.2024.01.011 Abstract （94）      PDF（pc） （531KB）（154）       Knowledge map    Save This paper explores the benefits of alleviating college students' mood and improving their psychological quality, expected to provide reference for the popularization and application of horticultural therapy in colleges and universities. Through 10 types of horticultural activities, and the POMS scale and satisfaction survey were used for quantitative and qualitative analysis. The results indicate that the mood state TMD of participants in 10 horticultural activities decrease, with an average decrease of 12.68; Activities such as plant recognition, leaf vein bookmarking, plant sowing, plant rubbing, succulent planting, and sachet making can significantly improve the negative emotions of college students; Various horticultural activities have a good effect on improving specific mood states such as fatigue (2.50), depression (2.05), and tension (1.91). Among them, plant rubbing activities have the best effect and can significantly improve 6 mood states; The average overall satisfaction evaluation of various horticultural activities is 8.10, indicating a good overall evaluation, with higher satisfaction rates for sachet making and succulent planting. This study indicates that each horticultural activity has a certain improvement effect on the participants' emotions. Plant recognition, plant sowing, succulent cultivation, and sachet making improve the participants' psychological status well, conclusion that horticultural therapy can improve the psychological quality of college students to a certain extent. It is feasible to apply horticultural therapy to college students' mental health education. Reference | Related Articles | Metrics | Comments（0）