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30 August 2024, Volume 53 Issue 4 Previous Issue   
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Analysis of the Geographical Distribution Characteristics of Prunus Subgenus Padus in China BAO Zi-yu, YE Qiang, LI Wei, CUI Shi-xin, YANG Hai-jun 2024, 53(4): 285-296.  DOI: 10.3969/j.issn.1009-7791.2024.04.001 Abstract ( )   PDF (5301KB) ( )   Prunus Linn. subgenus Padus (Mill.) A.Gray belongs to the subfamily Amygdaloideae Arn. of Rosaceae, with 26 species in the world and 17 species in China, which mainly are distributed in the northern temperate regions and the Himalayan mountains. Basing on the analyzes of the geographic and floristic distribution of subgenus Padus and the regional differences in climate zones, the results were summarized as follows: (1) From a horizontal distribution perspective, the subgenus Padus was mainly distributed in the subtropical regions of China and the southeastern regions of Qinghai-Xizang Plateau, viz. the area south of latitude 35°N, and the similarity coefficient with those surrounding countries and regions ranges from 0.11 to 0.38. It suggested that the Hengduan Mountains and Eastern Himalayas were the modern distribution and diversity center, while the Central China and the Hengduan Mountains served as the refuge for the subgenus Padus, and the relevant areas played an important role in its flora formation and species evolution. (2) From a vertical distribution perspective, the distribution of the subgenus Padus was suitable for an altitude range of 800-4200 m, with two species concentration zones appearing at elevations of 1200-1600 m and 2400-2800 m, respectively. (3) The subgenus Padus was a part of the East Asian flora, but it contained a few components of the Pan Arctic flora, and its geographical distribution characteristics contribute to the species classification of this group. This study provided a basis for further research on its population evolution and the causes of modern geographical distribution patterns in the subgenus Padus. References | Related Articles | Metrics

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Potential Suitable Area of the Starch Plant Lithocarpus uvariifolius in China SHAO Yan-qing, CHEN Xue-yi, WU Si-ni, ZHANG Shi-hong,WU Yu-fen, LI Yu-ling, HE Chun-mei, LUO Xiao-ying, LIN Jie-yu, TANG Guang-da 2024, 53(4): 297-307.  DOI: 10.3969/j.issn.1009-7791.2024.04.002 Abstract ( )   PDF (2547KB) ( )   Exploring the potential distribution range of Lithocarpus uvariifolius in China and its response to climate change is crucial for its cultivation and conservation. Based on 99 effective distribution points and 28 environmental variables of L. uvariifolius, we used the MaxEnt model and ArcGIS to simulate its potential habitat under current and three future climate change scenarios. We also investigated the main environmental factors that influence the geographical distribution of L. uvariifolius. The results indicated that: (1) The MaxEnt model was able to predict the potential distribution area of L. uvariifolius more accurately, with an AUC value of 0.988. (2) The distribution of L. uvariifolius was mainly affected by the precipitation in the coldest season (bio19), temperature seasonality (bio4), precipitation seasonality (bio15), elevation (elev), and annual precipitation (bio12). The precipitation factor had the largest combined contribution, which was a key factor affecting the distribution of L. uvariifolius. (3) Under the current climate, the total area of suitable areas for L. uvariifolius was 2.263×105 km2, accounting for about 2.4% of China's land area. (4) The total area of potential suitable areas for L. uvariifolius would increase significantly under future climate scenarios. It would obviously extend northward and westward, with a trend towards expanding to the high latitudes and high altitudes. (5) The distribution centers of L. uvariifolius were projected to migrate northwest to Hechi of Guangxi, under different future climate scenarios. References | Related Articles | Metrics

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Population Structure and Quantitative Dynamics of Paphiopedilum barbigerum in Maolan Karst Forest YU Cheng-jun, BAI Ping, LIU Hua-fu, CHEN Zheng-ren, MO Jia-wei, YAO Cheng-lin, FEI Shi-peng 2024, 53(4): 308-314.  DOI: 10.3969/j.issn.1009-7791.2024.04.003 Abstract ( )   PDF (1538KB) ( )   Paphiopedilum barbigerum was listed as a national level to protect plants. The purpose of this study aimed to investigate the population structure and quantity changes of P. barbigerum. Eight populations were randomly selected in Maolan National Nature Reserve of Guizhou Province for detailed statistics and analysis, and to analyze the population age structure, static life table, survival and mortality curves, and population dynamic quantitative indicators. The results showed that P. barbigerum mainly grew at an altitude range of 680 m to 800 m in Maolan National Reserve, and the slope direction was selected to distribute in the east, southeast, south and southwest slopes, especially in the south slope, where the proportion of rock exposed in small habitats exceeds 70%. The age structure of the population was pyramidal, showing a growing trend. The survival curve was close to Deevey-Ⅱ type, which indicated that the mortality of different age groups tended to be consistent, indicating that the population development had a tendency to continue to increase steadily. From the quantitative indicators of population structure dynamics, the dynamic index of individual number (Vx) were all positive, indicating that under the condition of no external interference, the active index of age structure of the whole population (Vpi) was 0.502＞0, indicating a positive increase in age structure of the whole population. When the population was disturbed, the active index of age structure (Vpi') was 0.024＞0, which was much smaller than Vpi and tended to zero, and the population structure tended to be stable. References | Related Articles | Metrics

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Establishment of an in vitro Tissue Culture and Rapid Propagation System using Lonicera hypoglauca and Content Assessment of Total Flavonoids and Chlorogenic Acid HE Duo-xiu, ZHANG Zhi-yong, Chris Rey LITUANAS 2024, 53(4): 315-324.  DOI: 10.3969/j.issn.1009-7791.2024.04.004 Abstract ( )   PDF (941KB) ( )   Lonicera hypoglauca is a traditional Chinese medicinal plant. In this study, the tender young leaves of L. hypoglauca were used for the first time as the explants to establish a rapid in vitro propagation and regeneration system. The results revealed that the optimal time for disinfection of the explants was 8 min and the optimal medium for callus induction was MS + 2,4-D 4.0 mg·L–1 + sucrose 30 g·L–1, with an average callus induction rate of 86.67%. The optimal medium to induce differentiation of callus to bud was MS + 6-BA 1.0 mg·L–1 + NAA 0.10 mg·L–1 + sucrose 30 g·L–1, with an average germination rate of 83.33%. The optimal medium to induce multiplication was MS + 6-BA 1.5 mg·L–1 + NAA 0.05 mg·L–1 + sucrose 30 g·L–1, with a multiplication coefficient of 5.42. The optimal medium for root induction was 1/2 MS + NAA 0.15 mg·L–1 + activated carbon 0.3 g·L–1 + sucrose 15 g·L–1, with an average rooting rate of 91.11%. The survival rate of tissue-cultured seedlings in nutrient soil cultivation medium was as high as 100%. The total flavonoid content and chlorogenic acid content in the explant, callus tissue and regenerated plant were 1.83%, 2.27%, 1.33% and 2.77%, 1.83%, 1.74% respectively. This study provides novel insights into the rapid propagation and mass production of L. hypoglauca seedlings at an industrial scale and that it exhibits important application value and future prospects. References | Related Articles | Metrics

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A Simple and Efficient Method of Alfalfa Propagation by Semi-wet Cutting TIAN Dai-cai, HU Jin-ning, CONG Li-li, CHAI Mao-feng, WANG Zeng-Yu, XIE Hong-li 2024, 53(4): 325-330.  DOI: 10.3969/j.issn.1009-7791.2024.04.005 Abstract ( )   PDF (1101KB) ( )   Cutting is one of the important methods to propagate and preserve good varieties and resources, especially for self-incompatibility and cross-pollination alfalfa. Currently, there are some limitations in the application of current alfalfa cutting methods, such as complicated operation and long cycle. Based on the theory of root regeneration controlled by mitochondria, a simple and efficient new cutting method of alfalfa, named semi-wet cutting method was proposed in this study. This method can be completed only by covering the cuttings with moisturizing material and placing them in a container. In this experiment, two alfalfa varieties, ‘Zhongmu No. 1’ and ‘Xinjiang Daye’, were selected and cultured by semi-wet method and hydroponics method, aiming at comparing the rooting effect of different varieties under semi-wet method and the difference between the two cutting methods. The experimental results showed that there was no significant difference in the rooting rate of the two varieties by using semi-wet cutting, and the rooting rate was very high, more than 90% on the 8th day and close to 100% on the 10th day in both varieties, which was significantly faster than that by using hydroponic cutting. To sum up, semi-wet cutting not only simplified the operation process, but also effectively shortened the rooting time, which has important practical application value for the propagation of alfalfa and the collection of field resources. References | Related Articles | Metrics

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Quantitative Analysis of Flue-cured Tobacco Leaf Color with Row Spacing and Density Configuration ZHOU Xiao-feng, HUANG Hui, ZHOU Wen-liang, ZHAO Zhen-feng, PAN Heng-de, WU Feng, HUANG Yan-zhang, LI Zhang-hai, ZHU Ying-hua 2024, 53(4): 331-340.  DOI: 10.3969/j.issn.1009-7791.2024.04.006 Abstract ( )   PDF (382KB) ( )   In order to clarify the influence of different row spacing and planting density configurations on the color of flue-cured tobacco leaves, the color parameters of front and dorsal of flue-cured tobacco leaves under different row spacing (R1, 110 cm and R2, 120 cm) and planting density (D1, 16500 plants·hm–2 and D2, 19500 plants·hm–2) were measured by a color difference meter. The results showed that compared to R1, the color parameters of R2 were significantly decreased such as the brightness uniformity value (ΔL1), redness value (a) and color difference uniformity value (ΔE1). Compared with D1, the color parameters of R2 were significantly increased such as brightness value (L), yellowness value (b) in leaf tip and middle, yellowness difference (Δb), redness difference (Δa) and yellowness uniformity value (Δb1) in front of leaf, while hue angle (H) of D2 was significantly decreased. In the interaction between row spacing and planting density, L of R2D2 was significantly higher than that of R1D1. a of R1D1 was significantly higher than that of R1D2 in front of leaf, and Δa of R1D2 was significantly lower than that of other treatments. Δb of R1D1 and R1D2 was significantly lower than that of R2D2, while the Δb1 of R1D1 was significantly lower than that of R2D2. ΔE1 of R2D2 was significantly lower than that of other treatments in front of leaf, and the ΔE1 of R2D1 and R2D2 in dorsal of leaf was significantly lower than that of R1D2. The H of R1D1 was significantly higher than that of R1D2 and R2D2. In conclusion, the arrangement of 120 cm row spacing and planting density of 16500 plants·hm–2 was conducive to the improvement of a, b, uniformity and H of primary flue-cured tobacco leaves, and promotes the formation of high appearance quality tobacco leaves in Baise Valley tobacco area. References | Related Articles | Metrics

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Effect of Number and Time of Terminal Leaves Removal on Yield and Quality of Upper Leaf of Flue-cured Tobacco LIU Shun-qi, ZHANG Hong-fei, LIU Qiang, AI Fu-qing 2024, 53(4): 341-349.  DOI: 10.3969/j.issn.1009-7791.2024.04.007 Abstract ( )   PDF (372KB) ( )   o optimize the tobacco structure and increase the availability of the upper leaves, the upper leaves of Yunyan 87 were used as the test material to study the effects of different quantities and times of removing the top leaves on the agronomic and economic traits of roasted cigarettes, as well as their chemical composition, physical characteristics and smoking quality. The results were as followed. (1) Compared to no defoliation, the defoliation treatment promotes an increase in leaf length, leaf width, and leaf area of the upper leaves. (2) Both the number and time of removing the top leaves had a significant effect on the rate of top-quality smoke, the rate of medium top-quality smoke, the rate of miscellaneous coloured smoke, and the yield; the yield and production value of the treatment without removing the leaves were the highest, and the rate of top-quality smoke and the average price were the highest in the treatment of removing one piece of top leaf at the time of topping. (3) There were significant effects of both the number and time of removing the top leaves on nicotine, total nitrogen, starch, potassium ions, and sugar-alkali ratios, and their reciprocal effects on nicotine, total nitrogen, total sugars, reducing sugars, and nitrogen-alkali ratios; the chemical compositions were most harmonised in the no-leaf treatment, followed by the removal of two top leaves at the second harvest of the central leaves at the time of harvesting. (4) The number of top leaves removed only had a significant effect on thickness, tensile strength and weight of a single leaf, while the time of removing the top leaves and the interaction effect had a significant effect on the indicators of physical properties, and removing the top leaves in the second bed of the central leaf harvesting could make the physical properties better. (5) The highest score in the comprehensive evaluation of suction quality was obtained by removing 2 pieces of top leaves at the second bed harvesting of the middle leaves. On the whole, removing 2 pieces of top leaves at the second bed harvesting of the middle leaves is favourable to the improvement of the yield quality of the upper leaves. References | Related Articles | Metrics

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Application Research and Activity Participation Experience of Horticultural Therapy Projects in American Botanical Gardens ZHANG Tong, CHENG Yu, LI Tong-yu, Claudia KY LAI, XUE Bin-xia 2024, 53(4): 350-362.  DOI: 10.3969/j.issn.1009-7791.2024.04.008 Abstract ( )   PDF (5309KB) ( )   Horticultural therapy programs in botanical gardens have gradually become an effective medium for stress recovery and emotion regulation. At present, domestic botanical gardens pay less attention to the horticultural therapy program, and mostly focus on the sensory experience of plant-specific gardens, and have not yet formed a multi-dimensional macro-system that supports the development of horticultural therapy programs in terms of the environment of the botanical landscape, horticultural activities, and post-management and operation and maintenance techniques. This paper selects 28 botanical gardens with horticultural therapy programs as research objects in America, and firstly expounds the long history of American botanical gardens and the development of their horticultural therapy programs; secondly, compiles the application of horticultural therapy programs in American botanical gardens, which specifically includes the types of healing gardens such as sensory gardens, meditation gardens, and labyrinth gardens, and horticultural activities carried out by the combination of horticultural labor activities, health experience programs, horticultural popularization and creation courses, as well as horticultural activities carried out by the courses. Finally, the operation strategies of horticultural therapy programs in botanical gardens, such as creating a good healing environment, setting up horticultural therapy programs full of humanistic care, and seeking professional cooperation from colleges and universities, are summarized, with a view to providing reference for the development of this field in domestic botanical gardens. References | Related Articles | Metrics

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A Newly Recorded Species of Prosaptia contigua in Fujian Province and Analysis of Its Chloroplast Genome CHEN Zhang-xue, CHEN Bin, TIAN Min, HUANG Ying-lin, ZHANG Miao, CHEN Bing-hua 2024, 53(4): 363-368.  DOI: 10.3969/j.issn.1009-7791.2024.04.009 Abstract ( )   PDF (2260KB) ( )   A newly recorded genus of ferns, Prosaptia C. Presl, and a newly recorded species, Prosaptia contigua (G. Forst.) C. Presl., have been identified in Fujian Province. The corresponding habitat and detailed images are provided, and the voucher specimens are preserved in the Herbarium of Fujian Normal University (FNU). In addition to morphological identification, a phylogenetic tree was constructed based on the combined genes of rbcL and atpB. The results showed that the newly recorded species matched the P. contigua in the NCBI database (BP/PP=93/0.99), providing strong support. The chloroplast genome genome was sequenced, assembled, and annotated using the second-generation high-throughput whole genomes sequencing, revealing a typical four-stage structure with a total length of 148 722 bp and comprising123 genes (including 31 tRNA genes, 8 rRNA genes and 84 protein-coding genes). These findings provide a solid foundation for subsequent studies on the phylogeny of Polypodiaceae. References | Related Articles | Metrics

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Six Newly Recorded Species of Orchidaceae form Guizhou Province FEI Shi-peng, CHEN Zheng-ren, LIU Shao-fei, LIU Hua-fu, MO Jia-wei, YU Ping, YU Deng-li 2024, 53(4): 369-372.  DOI: 10.3969/j.issn.1009-7791.2024.04.010 Abstract ( )   PDF (1528KB) ( )   Six newly recorded species of Orchidaceae were identified in Guizhou Province, viz., Podochilus khasianus Hook. f., Bulbophyllum omerandrum Hayata, Phaius tonkinensis (Aver.) Aver., Plalaenopsis lobbii (Rchb. f.) Sweet, Pholidota wenshanica S. C. Chen et Z. H. Tsi, Pinalia bipunctata (Lindl.) Kuntze. These new records have enriched the diversity of Orchidaceae in Guizhou Proviece, and of certain significance to the study of flora in the future. References | Related Articles | Metrics

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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 2024, 53(4): 373-376.  DOI: 10.3969/j.issn.1009-7791.2024.04.011 Abstract ( )   PDF (9036KB) ( )   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. References | Related Articles | Metrics

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New Records of Plant Distribution in the Huaihe River Basin in Anhui Province DONG Jin-ting, ZHANG Run-tang, HOU Xue-liang 2024, 53(4): 377-380.  DOI: 10.3969/j.issn.1009-7791.2024.04.012 Abstract ( )   PDF (1897KB) ( )   After years of field investigation in the Huaihe river basin, a large number of plant specimens were accumulated and identified. The results indicated that four species were new recorded of plant distribution in Anhui Province, namely Persicaria bungeana (Turcz.) Nakai ex T. Mori, Rumex patientia L., Mollugo verticillata L., and Ludwigia perennis L. Each species was provided with on-site photos and of morphological characteristics description. The voucher specimens were stored in the Herbarium of Xiamen University (AU). References | Related Articles | Metrics

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Multi-omics Research Progress on the Active Ingredients Biosynthesis and Regulation in Dendrobium officinale LIU Li-qing, GUO Chi-ming, SHI Jian-yu, GUO Ying, MENG Hong-yan, ZENG Xin-ping 2024, 53(4): 381-388.  DOI: 10.3969/j.issn.1009-7791.2024.04.013 Abstract ( )   PDF (374KB) ( )   Dendrobium officinale, an important medicinal plant in the Dendrobium genus of Orchidaceae, is rich in active metabolites such as polysaccharides, alkaloids and flavonoids. The biosynthesis, regulation and accumulation of plant metabolites is a complex process. In recent years, omics technologies such as genomics, transcriptomics, proteomics, and metabolomics have developed rapidly, providing a deeper understanding of the multi-level regulatory network of D. officinale metabolites from different dimensions such as transcription, post transcription, translation, and epigenetics. This article reviews the multi-omics research progress on the active ingredients biosynthesis and regulation in D. officinale, and prospects the future research directions, which can provide theoretical basis for molecular breeding, cultivation management and industrial application of D. officinale. References | Related Articles | Metrics