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30 April 2020, Volume 49 Issue 02 Previous Issue    Next Issue
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Plant molecular biology
Plant physiology and biochemistry
Plant ecology
Plant ecology, resources and taxonomy
Tissue culture
Reviews


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Plant molecular biology

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Application of Chinese Herbal Medicine in Prevention and Treatment of Corona Virus Disease 2019 LI Xuan, XU Zi-xian, MING Yan-lin 2020, 49(02): 83-92.  DOI: 10.3969/j.issn.1009-7791.2020.02.001 Abstract ( )   PDF (395KB) ( )   Corona Virus Disease 2019 (COVID-19) is an infectious disease caused by SARS-CoV-2. It is extremely infectious and pathogenic. The infector is often accompanied by fever, fatigue, cough and other symptoms. Since the first discovery in December 2019, COVID-19 has quickly swept the world and has received great attention from domestic and international. Traditional Chinese medicine is a traditional culture in China. The National Health Commission and the State Administration of Traditional Chinese Medicine published the traditional Chinese medicine treatment plan in the Diagnosis and Treatment Plan of Corona Virus Disease 2019 (Trial Version 3). Heat clearing and detoxifying, qi and blood circulation, clearing lung and eliminating phlegm and other traditional Chinese medicines are commonly used in the prevention and treatment of COVID-19. The flavonoids such as quercetin, kaempferol and baicalein are the main active ingredients. The therapeutic effect proves that the application of Chinese herbal medicine plays an important role in anti-virus, anti-inflammatory, and alleviating the symptoms of patients. In particular, the overall cure rate of patients in China has reached more than 94%, much higher than that of other countries. Based on the characteristics of SARS-CoV-2, this review summarizes the research progress of medicine plants and their active ingredients involved in the treatment of COVID-19, and provides a reference for preventing COVID-19. References | Related Articles | Metrics

Plant physiology and biochemistry

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Extraction Optimization of Betulinic Acid from Marsdenia tenacissima Using Response Surface Methodology SHI Ling, WANG Ze-feng, ZHANG Wei, MIN Yong 2020, 49(02): 93-98.  DOI: 10.3969/j.issn.1009-7791.2020.02.002 Abstract ( )   PDF (437KB) ( )   Response surface methodology was used to optimize the extraction technology of betulinic acid from Marsdenia tenacissima. Based on single-factor experiments, ultrasonic power, extraction duration, material-liquid ratio, and times of extraction were selected as influencing factors during extraction. The experiment mathematical model was arranged according to Box-Behnken central composite experiment design, which studied each variable and their interactions on the extraction yield of betulinic acid. The quadratic multinomial model on the extraction yield of betulinic acid and each influence factor of extraction betulinic acid from M. tenacissima was established by using the Design-Expert software. And the optimum conditions were as follows: ultrasonic power 150 W, material-liquid ratio 1:25, extraction duration 20 min and extraction twice. The predicted value of extraction yield of betulinic acid was 0.314% under the optimum conditions, and the experimental value was 0.311%. References | Related Articles | Metrics

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Effects of Mycorrhizal Fungi and Fertilization on Nutrient Uptake of Rhododendron simsii Seedlings YANG Shu-ting, OU Jing, LI Lin-pan 2020, 49(02): 99-106.  DOI: 10.3969/j.issn.1009-7791.2020.02.003 Abstract ( )   PDF (293KB) ( )   The effects of different inoculation methods and nitrogen, phosphorus, and potassium fertilization on the growth, nutrient absorption of two-year-old azalea seedlings were studied. The inoculation methods were as follows: J1(Rhododendron mycorrhizal fungi mixed inoculation), J2(mixed inoculum of Rhododendron mycorrhizal fungi and Pinus massoniana exophytes), J3 (no inoculum, control). The growth and nutrient uptake of Rhododendron simsii seedlings with different inoculation and N, P, K fertilizer combinations were investigated. Results showed that the growth index and the content of nitrogen, phosphorus, and potassium of the seedlings with inoculation treatment were better than those with non-inoculation treatment. The application of F6 (1.1 g urea, 1 g calcium magnesium phosphate and 0.7 g potassium chloride per plant) under J2 treatment had the most significant effect on the growth and accumulation of N, P, and K in Rhododendron seedlings. The data showed that J2 treatment promoted N accumulation in leaf, K accumulation in stem and leaf, and P accumulation in root and stem; J1 treatment promoted N and P accumulation in root and stem, and K accumulation in stem and leaf. References | Related Articles | Metrics

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Drought Tolerance of Chinese Fir Seeds and Seedlings at Different Developmental Stages Lü Qing-yun, HU De-huo, DENG Hou-yin, YAN Shu, WEI Ru-ping, WANG Run-hui, ZHENG Hui-quan 2020, 49(02): 107-111.  DOI: 10.3969/j.issn.1009-7791.2020.02.004 Abstract ( )   PDF (392KB) ( )   The present study aimed to investigate the effect of the polyethylene glycol (PEG-6000) simulated graduated drought stress (5%, 10%, 20% and 40% PEG-6000 equaled to mild, moderate, strong and heavy levels, respectively) on the germination of seeds from Chinese fir second improved seed orchard and its seedlings regarding to their dynamic change at different stages (cotyledon and true leaf stages). The results indicated that germination of the Chinese fir seeds required adequate water and were rather drought-sensitive. Worsening drought largely delayed the germination time, and significantly reduced the germination rate. The late cotyledon state seedlings were more drought tolerant than those at early stage, while true leaf state seedlings seemed to have strong tolerance to mild and moderate stress. References | Related Articles | Metrics

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Effect of Foliar Spray Amino Acid Selenium Fertilizer on Selenium Enrichment and Polysaccharide Content of Dendrobium officinale CHEN Li-xuan, CHEN Fei, CHEN Chun, LIN Zhi-kai, WANG Wen-hua 2020, 49(02): 112-115.  DOI: 10.3969/j.issn.1009-7791.2020.02.005 Abstract ( )   PDF (238KB) ( )   Different concentrations of amino acid selenium (Se) fertilizer (AAFSF) were studied to determine its dose effect on the Se enrichment, sprouting and polysaccharide content of artificial cultivated red-stem Dendrobium officinale branch (i.e. fresh branch) in the intelligent greenhouse. The results showed that the content of Se and polysaccharide in fresh branches were significantly increased after diverse AAFSF treatments. A positive correlation between the Se content of fresh branches and the AAFSF concentration was observed, as well as the significant differences among all AAFSF treatments. The content of polysaccharide was also positively correlated under low concentration of AAFSF (CK, 1200, 900 times). It reached to the highest value of 35.213 g·kg-1 when AAFSF of 900 times was applied, and then gradually decreased after higher AAFSF treatments. By using the concentration of AAFSF at 900 times, more than 90% of the fresh branches sprouted three new leaves, indicating that AAFSF could significantly promote the growth of the fresh branches. Therefore, 900 times of AAFSF was the most suitable concentration that could be applied in prophase of nutrient accumulation for red-stem Dendrobium officinale. References | Related Articles | Metrics

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Preservation of Fresh-cut Taro by Carvacrol Microemulsion LIN Yu 2020, 49(02): 116-120.  DOI: 10.3969/j.issn.1009-7791.2020.02.006 Abstract ( )   PDF (302KB) ( )   In order to improve the fresh-keeping technology of fresh-cut taro, and develop a new type of natural and safe preservative, carvacrol microemulsion was used to preservative fresh-cut taro, and analyzing indicators was determined. The results showed that the carvacrol microemulsion could effectively control the growth of microorganisms, inhibit the activities of enzymes (polyphenol oxidase, peroxidase), hold off the loss of nutrients (soluble solids, starch), maintain better sensory quality, and extend the shelf life of fresh-cut taro. References | Related Articles | Metrics

Plant ecology

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Medicinal Plant Resources in Qingyun Mountain, Guangdong Province, China YANG Xin-dong, CHEN Mei-yi, YU Xiao-ling, CUI Yu-wen, DU Xiao-jie, XIE Chong-lin, QIN Xin-sheng, XING Fu-wu, WANG Fa-guo 2020, 49(02): 121-127.  DOI: 10.3969/j.issn.1009-7791.2020.02.007 Abstract ( )   PDF (381KB) ( )   There were 1266 species and infraspecies of wild plants belonging to 168 families, 605 genera in Qingyun mountain nature reserve, Guangdong Province, China. The wild medicinal plants included 586 species belonging to 140 families, 385 genera. The 8 families including species more than 15 were as follows: Compositae, Rubiaceae, Gramineae, Labiatae, Orchidaceae, Papilionaceae, Euphorbiaceae, and Scrophulariaceae. According to their effectiveness, they were classified blood-activating and stasis-elirninating (including 107 species), heat-clearing and detoxifying (90 species), cough relieving and lung clearing (60 species), enteritis treating (58 species), traumatic hemorrhage (56 species), snake bite treating (56 species), and detumescence and pain relieving (30 species). According to their medicinal parts, they were classified medicinal plants of whole plants (including 304 species), roots and rhizomes (185 species), leaves (131 species), stems (49 species), cortexes (47 species), fruits (42 species), flowers (14 species) and others (20 species). The result showed that the correlation analyses of life forms, habitats and altitudes of these medical plants were significantly different. References | Related Articles | Metrics

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Diurnal Variation of Three Kinds of Water Lily Flowers in Guangzhou LAI Ming-li, FENG Zhi-jian, WENG Shu-fei, XIAN Li-hua 2020, 49(02): 128-133.  DOI: 10.3969/j.issn.1009-7791.2020.02.008 Abstract ( )   PDF (1121KB) ( )   To understand the daily variation of Nymphaea flowering, this paper investigated and recorded the flowering process of Nymphaea plants on campus’ wetland park in Guangzhou. The results showed that the daily variation of the tropical water lilies flowering at night was the flowers opened at night and continued to the next morning, while the tropical water lilies and hardy water lilies flowering during the daytime, and the flowering time varies depending on the species. Tropical water lily Nymphaea ‘Independence’ and hardy water lily Nymphaea ‘Colorado’ flowering during the daytime, their single flowering period was 3—4 d; N. mexicana, a hardy water lily, its single flowering period was 2 d. The male and female stamens matured successively to achieve cross-pollination, which resulted in different forms of stamens during flowering of water lilies. From October to December, flowering clock of Nymphaea ‘Independence’ was that opens at sunrise and closes at sunset, the shortened photoperiod resulted in the shortened open and close rhythm of the Nymphaea ‘Independence’. The results provided accurate data support for the selection and configuration of Nymphaea in garden water features. References | Related Articles | Metrics

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New Distribution Record of Angiosperm in Fujian (Ⅷ) AN Chang, LIU Jian-fu, JIANG Kai-wen, ZHUANG Yi-xue, YANG Cheng-zi, FAN Shi-ming 2020, 49(02): 134-137.  DOI: 10.3969/j.issn.1009-7791.2020.02.009 Abstract ( )   PDF (629KB) ( )   During the fourth survey of Chinese medicine resources and the investigation of native plants in Fujian Province, two newly recorded genera including Gymnopetalum Arn. and Canscora Lam., four new records of plants in Fujian Province including Gymnopetalum chinense (Lour.) Merr., Canscora andrographioides Griff. ex C. B. Clarke, Dunbaria crinita (Dunn) Maesen, Myrsine semiserrata Wall. were discovered, and all of them were new records of flora in East China region. The vouchers specimens were preserved in Herbarium of Fujian University of Traditional Chinese Medicine (FJTCM) and Shanghai Chenshan Herbarium (CSH). References | Related Articles | Metrics

Plant ecology, resources and taxonomy

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One Genus and Five Species New Records of Angiosperms in Fujian Province CHEN Yong-bin, CHEN Xin-yan, MA Liang, CHEN Shi-pin, LI Heng, YANG Cheng-zi, FAN Shi-ming, LIANG Hui 2020, 49(02): 138-141.  DOI: 10.3969/j.issn.1009-7791.2020.02.010 Abstract ( )   PDF (414KB) ( )   One genus and five species of angiosperms were reported as new records to Fujian Province in this study, i.e. Hamamelis L., Hamamelis mollis Oliver, Primulina swinglei (Merr.) Mich. M?ller & A. Weber, Lilium concolor Salisb., Yinshania?sinuata?(K. C. Kuan) Al-Shehbaz et al., Cinnamomum kwangtungense Merr. The voucher specimens were preserved in Dendrological Herbarium, College of Forestry, Fujian Agriculture and Forestry University (FJFC). References | Related Articles | Metrics

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Two New Records of Ferns from Jiangxi Province XU Guo-liang, CAI Wei-long 2020, 49(02): 142-144.  DOI: 10.3969/j.issn.1009-7791.2020.02.011 Abstract ( )   PDF (320KB) ( )   By means of ferns investigation in Jiulianshan Mountain, 2 species of ferns were reported as new records to Jiangxi Province, viz. Pteris fauriei Hieron. var. chinensis Ching et S. H. Wu and Diplazium baishanzuense ?(Ching & P. S. Chiu) Z. R. He. The vouchers specimens were preserved in Herbarium of Jiulianshan Nature Reserve Administration (JNR). References | Related Articles | Metrics

Tissue culture

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In vitro Culture and Rapid Propagation of Hypoxis angustifolia LI Hong-lin, ZHONG Zhi-xiang, XIE Juan, HU Guang-wan 2020, 49(02): 145-147.  DOI: 10.3969/j.issn.1009-7791.2020.01.012 Abstract ( )   PDF (319KB) ( )   The buds of Hypoxis angustifolia were used as material for tissue culturing. The results showed that the optimum culture medium for bud callus induction was MS + 6-BA 0.8 mg·L-1 + NAA 0.05 mg·L-1 + TDZ 0.1 mg·L-1; the culture medium for bud induction was MS + 6-BA 0.5 mg·L-1 + NAA 0.02 mg·L-1 + AC 0.2 g·L-1; the culture medium for propagation was MS + 6-BA 1.0 mg·L-1 + NAA 0.1 mg·L-1 + Huabao-1 1 g·L-1 + AC 0.2 g·L-1. And the subculture circle was 30 d, the multiplication rate was 10-20. The culture medium for root was 1/2 MS + IBA 0.5 mg·L-1 + NAA 0.02 mg·L-1 +AC 0.5 g·L-1. The suitable transplanting medium was surface soil and vermiculite (3:1), the survival rate reached 80%. References | Related Articles | Metrics

Reviews

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Review of Tea Plant (Camellia sinensis) Root Growth and Its Influencing Factors CHEN Wei-li, GE Chao-mei, YE Tao, ZHANG Ran, SUN Qin-yu, ZHANG Jia-xia 2020, 49(02): 148-156.  DOI: 10.3969/j.issn.1009-7791.2020.02.013 Abstract ( )   PDF (328KB) ( )   Root, an organ to help plant absorbing water and nutrients and major force to sustain the aboveground part, plays an important role in plant growth and development. In this paper, structure, characteristics, functions and nutritional properties of tea plant (Camellia sinensis) root and recent studies of the effect and regulation of biotic and abiotic factors on its growth and development were reviewed with presenting some further research prospect in order to provide references for the related study and practical application in the future. References | Related Articles | Metrics

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Causes and Mechanism on Crop Continuous Monoculture Problems and Its Control Strategy WENG Pei-ying, ZHENG Hong-yan 2020, 49(02): 157-162.  DOI: 10.3969/j.issn.1009-7791.2020.02.014 Abstract ( )   PDF (311KB) ( )   On the basis of discussing the harm of continuous cropping obstacle, this paper reviewed the cause and forming mechanism of continuous monoculture problems from the perspective of plant nutrition, soil and rhizosphere microbiology. The previous studies showed that the formation of the continuous cropping monoculture problems is a complex rhizosphere biological process, which is caused by the root exudates from continuous cropping crops to mediate the imbalance of rhizosphere soil microbial structure. This in turn leads to the increased pathogenic microorganisms, soil acidification and nutrient sequestration. Accordingly, the control measures and remediation techniques of continuous cropping obstacles were further summarized to provide a technical reference for effectively overcoming the continuous monoculture problems. References | Related Articles | Metrics