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30 December 2023, Volume 52 Issue 6 Previous Issue    Next Issue
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Plant physiology and biochemistry
Plant ecology, resources and taxonomy
Plant cultivation techniques


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Plant physiology and biochemistry

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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 2023, 52(6): 465-474.  DOI: 10.3969/j.issn.1009-7791.2023.06.001 Abstract ( )   PDF (880KB) ( )   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). References | Related Articles | Metrics

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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 2023, 52(6): 475-480.  DOI: 10.3969/j.issn.1009-7791.2023.06.002 Abstract ( )   PDF (698KB) ( )   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. References | Related Articles | Metrics

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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 2023, 52(6): 481-486.  DOI: 10.3969/j.issn.1009-7791.2023.06.003 Abstract ( )   PDF (389KB) ( )   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. References | Related Articles | Metrics

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Research on the Screening of Rosa chinensis Minima Cuttings and the Physiology and Anatomical Structure of Root Formation ZHAO Bing-xue, ZHOU Lin, HUANG Qing-jun, YANG Liu-yan, YAO Jian-jun, ZHANG Yong-chun 2023, 52(6): 487-494.  DOI: 10.3969/j.issn.1009-7791.2023.06.004 Abstract ( )   PDF (307KB) ( )   To investigate the influence of unlignified, semi-lignified, and lignified cuttings on root formation, two varieties of Rosa chinensis var. minima known as ‘Lady’ and ‘Venus’ were employed as test subjects in this experiment. Simultaneously, the dynamic changes of the endogenous hormone content of the semi-lignified cuttings of ‘Lady’ were determined, and their anatomical structure was observed. The results showed that the lignification degree of cuttings affects the rooting of cuttings. The cutting effect of the two mini rose cultivars is as follows: semi-lignified cuttings > unlignified cuttings > lignified cuttings. The semi-lignified cuttings of the ‘Lady’ variety exhibited adventitious root formation within 7 days of cutting, exhibiting superior rooting ability compared to ‘Venus’. The indole-3-acetic acid (IAA) content in the semi-lignified cuttings of ‘Lady’ displayed a decreasing trend over time, while the abscisic acid (ABA), gibberellic acid (GA), and zeatin riboside (ZR) contents initially decreased and then increased. Variations in the levels of source hormones collectively influence the formation of adventitious roots. Anatomical observations revealed the absence of latent root primordium in rose cuttings, indicating that they belong to the category of induced root primordium. The adventitious root primordium originated from the parenchymal cell in phloem and vascular cambium. References | Related Articles | Metrics

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Comprehensive Evaluation of Water Tolerance of 8 Common Garden Ground Cover Plants in Shenzhen GAO Hong-juan, XU Yan, LEI Jiang-li, SHI Zheng-jun 2023, 52(6): 495-503.  DOI: 10.3969/j.issn.1009-7791.2023.06.005 Abstract ( )   PDF (982KB) ( )   Eight common garden ground cover plants in Shenzhen were used as the materials, and their ornamental traits and physiological indexes under different waterlogging stress were studied. The waterlogging tolerances of eight plants were compared through the main component analysis and the subordination function method. The results showed that the order of waterlogging tolerance of 8 plants from strong to weak was Angelonia salicariifolia, Hymenocallis littoralis, Ixora chinensis, Hibiscus rosa-sinensis, Portulaca grandiflora, Cordyline fruticosa, Tibouchina semidecandra, Begonia semperflorens. The relative water content, MDA content, relative conductivity, and Fv/Fm were the most important indexes to reflect the physiological changes of plant leaves under waterlogging stress. References | Related Articles | Metrics

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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 2023, 52(6): 504-510.  DOI: 10.3969/j.issn.1009-7791.2023.06.006 Abstract ( )   PDF (430KB) ( )   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. References | Related Articles | Metrics

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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 2023, 52(6): 511-517.  DOI: 10.3969/j.issn.1009-7791.2023.06.007 Abstract ( )   PDF (541KB) ( )   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. References | Related Articles | Metrics

Plant ecology, resources and taxonomy

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Effect of Row Spacing and Density Configuration on the Economic Characters of Flue-cured Tobacco in…… Southern Guizhou Mountainous Region JIANG Guang-hua, LONG Zeng-yu, WEI Xing-qi, JIANG Shao-yang, GENG Wen-tang, LIU Lin, LI Zhang-hai, ZHU Ying-hua 2023, 52(6): 518-524.  DOI: 10.3969/j.issn.1009-7791.2023.06.008 Abstract ( )   PDF (695KB) ( )   The research was conducted to determine the effects of row spacing, planting density and their interaction on the economic properties of flue-cured tobacco in southern Guizhou mountainous region. The field trial was conducted by split zone design along with the economic effect index (ECI) method and partial (Eta)2 effect analysis method. The results showed that output value and ECI of R1.1 treatment was higher than that of R1.0 treatment. Weight per leaf and first-class flue-cured tobacco ratio were reduced along with the increase of planting density, and those of D1.5 were significantly higher than D2.1. While the yield and output value of D2.1 were significantly higher than those of D1.5. The ECI was increased firstly and then decreased with the increase of planting density. So that of D1.8 was significantly higher than the other treatments. In the interaction between row spacing and planting density, the weight per leaf of R1.1D1.5 and R1.0D1.5 was significantly higher than that of R1.0D2.1 and R1.1D2.1, and the yield and output value were significantly lower than those of R1.0D2.1 and R1.1D2.1. The ECI of R1.1D1.8 was the highest and significantly higher than that in R1.0D1.5, R1.0D2.1 and R1.1D2.1. The effects of row spacing on the economic properties of flue-cured tobacco were relatively low, but the effects of planting density, interaction between row spacing and planting density on single leaf weight, proportion of superior tobacco, average price, yield, output value and ECI were higher. In conclusion, appropriate row spacing and planting density was conducive to the improvement of economic traits of flue-cured tobacco in southern Guizhou mountainous region. The planting density of 18000 plants·hm–2 combined with 110 cm row spacing was conducive to the realization of high quality and suitable yield of flue-cured tobacco cultivation in southern Guizhou mountainous region tobacco-planting ecological area. References | Related Articles | Metrics

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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 2023, 52(6): 525-533.  DOI: 10.3969/j.issn.1009-7791.2023.06.009 Abstract ( )   PDF (300KB) ( )   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. References | Related Articles | Metrics

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Growth Rhythm of Three Native Lianas from Guangzhou and Their Application in Landscape LI Ling-zhi, LUO Si-si, WENG Shu-fei, LIANG Qian-tong, FENG Yong-sha 2023, 52(6): 534-539.  DOI: 10.3969/j.issn.1009-7791.2023.06.010 Abstract ( )   PDF (324KB) ( )   The natural growth of three native lianas, Artabotrys hexapetalus, Mussaenda pubescens and Parthenocissus dalzielii, were observed and measured in the field to explore the annual growth of plants and branches as well as their garden application in Guangzhou. The results showed that the branch growth of three lianas were all in accordance with the Logistic growth model, and the fitting decision coefficients were 0.997, 0.992 and 0.997 respectively, which reached a very significant level (P<0.01), the validity and reliability of the parameters were guaranteed. In the annual cycle, the average monthly growth of branches of three lianas had a certain regularity, A. hexapetalus and M. pubescens had three growth peaks in March, June and September, P. dalzielii had two growth peaks in March and July. According to the phenological growth law, this paper discussed how to combine the phenological growth with the landscape application of lianas, and put forward suitable landscape application modes for three lianas, in order to achieve the formation of liana landscape purposes. References | Related Articles | Metrics

Plant cultivation techniques

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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 2023, 52(6): 540-546.  DOI: 10.3969/j.issn.1009-7791.2023.06.011 Abstract ( )   PDF (461KB) ( )   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. References | Related Articles | Metrics