Subtropical Plant Science

Genetic Diversity Analysis of Camellia sinensis in Dongshan, Suzhou by ISSR

LI Hao-yu, YANG Da-qiang, WANG Li-fen, ZHANG Zhong-xin, ZHENG Jun-hua, HAN Zhao-lan, ZHU Xu-jun, FANG Wan-ping, YIN Jiang-hai

2020, 49(03): 163-167. DOI: 10.3969/j.issn.1009-7791.2020.03.001

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The genetic diversity of tea plant in Dongting district of Suzhou was examined by ISSR. The results showed that 76 bands were amplified with 6 ISSR primers, the polymorphic bands of which were 70, and the polymorphism percentage was 92.11%. The genetic similarity was from 0.37-0.89. The GS was the greatest between Baisha and No.1 Dongling, and they had the highest genetic similarity and the smallest genetic distance. Cluster analysis classified the 51 cultivars into 2 major groups by UPGMA. Each group was divided into four subgroups and the genetic relationship was closer in the same subgroups. Among them, some different strains from the same breed had higher genetic similarity coefficients. The results suggested that ISSR was a useful tool for molecular genetic diversity and relationship analysis of tea cultivars.

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Compounds and Diurnal Variation of Floral Scent Emitted from Dendrobium primulinum

YAN Pei-pei, YE Wei, JIANG Jin-lan

2020, 49(03): 168-174. DOI: 10.3969/j.issn.1009-7791.2020.03.002

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The compounds and diurnal variation of floral scent emitted from Dendrobium primulinum were studied in this paper. The floral scent components of D. primulinum flowers were detected and analyzed at six time points (6:00, 9:00, 12:00, 15:00, 18:00, 21:00) in one day by static headspace combined with GC-MS. The results showed that the ranking of total floral scent emitted was 35.26% at 6:00 > 22.78% at 9:00 > 19.35% at 12:00 > 7.86% at 21:00 > 7.59% at 15:00 >7.17% at 18:00. 202 components were detected, including esters, terpenes, alcohols, aldehydes, alkylsk, et al., of which 93 were at 6:00, 87 were at 9:00, 68 were at 12:00, 61 were at 15:00, 63 were at 18:00, and 65 were at 21:00. Twenty-one common compounds at each time points. The floral scent emitted from D. primulinum was highest at 6:00 and lowest at 18:00. The main floral scent component was octyl acetate.

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Chemical Constituents in Stem Bark of Schima superba

HUANG Xin-xiang, HE En-ming, LIAO Jia-ruo, LI Jun-hao, YI Xue, WU Chun

2020, 49(03): 175-178. DOI: 10.3969/j.issn.1009-7791.2020.03.003

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Compounds from the stem bark of Schima superba were isolated and purified by a combination of various chromatographic techniques including positive phase silica gel, ODS, Sephadex LH-20 gel, and preparative HPLC methods. Their structures were elucidated by physiochemical property, MS and NMR analysis. Results showed that 9 compounds were obtained from 70% ethanol extract of the stem bark of S. superba and identified as triacontanoic acid(1), hexadecanoic acid(2), dodecanoic acid(3), pinonesinol(4), quercetin(5), kaempferol(6), americanin A(7), quercetin 3-O-β-D-glucopyranoside(8) and quercetin 3-O-α-L-rhamnopyranoside(9). Compounds 1—4 were firstly isolated from S. superba. Compounds 5, 7 and 9 were firstly isolated from the genus Schima.

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Effects of Shading Intensity on Growth of One-year-old Seedlings of Cunninghamia konishii and Its Dynamic Optimization

KANG Yong-wu, OU Jian-de, ZHANG Ji-mao, BAO Xiao-hong, CHEN Wen-rong

2020, 49(03): 179-184. DOI: 10.3969/j.issn.1009-7791.2020.03.004

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Single factor experiments were used to study the effects of shading intensities (50%, 75%, 100% light) on growth and growth rhythm of one year old Cunninghamia konishii seedlings. Growth indexes (ground diameter, seedling height) of seedlings were measured every 7 d during the experiment. Applying Logistic equation to fit the growth process of seedling height and ground diameter and calculate the growth rhythm at seedling stage of C. konishii. The law of shading affecting seedling growth and growth rhythm was revealed, the dynamic optimization method of light intensity was put forward, and the light condition of C. konishii seedlings was optimized and verified. The results showed that shading significantly promoted the height, ground diameter growth throughout the growth season, and it was the best with 50% light; the effect of shading on the height and diameter growth of C. konishii seedlings at different growth stages was different, so it was necessary to dynamic optimize the light intensity at seedling stage. Logistic equation fitted well the growth dynamics of C. konishii seedlings. 50% light shading intensity significantly promoted the linear growth rate, the maximum linear growth rate and total linear growth of C. konishii seedlings height, ground diameter. Shading significantly advanced the final days of linear growth, shortened linear growth duration of seedling height. Shading significantly delayed the linear beginning days of ground diameter. Dynamic optimization scheme of light intensity in C. konishii seedling stage: 50% light should be used at the stage of t≤133 d, and 100% light should be used at the stage of t>133 d.

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Relationship Between Rhizosphere Soil Fertility and Mycorrhizal Fungi Infection of Azalea

YANG Shu-ting, OU Jing, LI Lin-pan

2020, 49(03): 185-190. DOI: 10.3969/j.issn.1009-7791.2020.03.005

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Using 2 years old azaleas seedlings as test materials, setting up J1 (four kinds of azaleas mycorrhizal fungi), J2 (four kinds of azaleas mycorrhizal fungi and a kind of Pinus massoniana exogenous fungus), J3 (CK) three inoculation ways and with different levels of nutrient elements N, P, K, with Pearson correlation analysis and stepwise regression analysis method of statistics, the correlation between rhizosphere mycorrhizal fungus infection and soil fertility index was analyzed. The results showed that the soil infection rate and nutrient content of the inoculation treatment were significantly higher than that of the non-inoculation treatment. Under each inoculation treatment, the application of N, P, and K nutrients was 1 level (ie, urea 2.2 g, calcium magnesium phosphorus 1.9 g, potassium chloride 1.4 g per plant) could promote the accumulation of soil nutrient content, the application of P, K of 1/4 and N, P, K of 1/2 level under J2 treatment could also promote the accumulation of total nitrogen, available nitrogen and total potassium in the soil. Through correlation analysis, it was found that the infection rate of J1 treatment was positively correlated with total nitrogen content, the infection rate of J2 treatment was extremely significantly positively correlated with available potassium content, and the organic matter and available nitrogen content were significantly positively correlated with J3 treatment. Through stepwise regression analysis, it was found that the main fertility factors influencing the mycorrhizal fungal infection rate of rhododendron seedlings were total nitrogen, available nitrogen and available potassium.

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Characteristics and Utilization of Rhododendron Resource in Daxianfeng, Fujian

YANG Wen-fu

2020, 49(03): 191-195. DOI: 10.3969/j.issn.1009-7791.2020.03.006

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By the sample line method, the investigation of wild Rhododendron resources was conducted, then the Rhododendron species and their morphological characteristics, suitable environment, flowering period were recorded. The results showed that a total of 11 kinds of Rhododendron were discovered, including 3 species in the subgen. Tsutsusi, 4 species in the subgen. Azaleastrum, 3 species in the subgen. Rhododendron and 1 species in the subgen. Pentanthera, in addition, flowering periods and colors vary with species. Various landscapes could be enjoyed from spring to summer. The results of cuttage trial suggested that the survival rate of R. rivulare and R. molle were both above 45% which was beneficial for the resource preservation. Rhododendron in Daxianfeng is rich in the level of species resources, with diverse types and wide distribution, which has great potential for development and application.

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Preliminary Study on Anthracnose Resistance of Chinese Fir Third-generation Seed Orchard Parents

YANG Bai-qun, HU De-huo, ZHENG Hui-quan, LIU Wei-xin, Lü Yu-zhou

2020, 49(03): 196-199. DOI: 10.3969/j.issn.1009-7791.2020.03.007

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The present study aimed to analyze an early epidemic anthracnose case in a Chinese fir (Cunninghamia lanceolata) third-generation seed orchard (2 hm²) of Guangdong. The results indicated that the anthracnose occurred over the first two years (2016—2017) with little impact on the health of the seed orchard. In 2018 (the seed orchard was two and half years old), the anthracnose had a breakout and greatly impacted the seed orchard leading to 42.5% of the grafted plantlets suffering an anthracnose disease. Regarding the clonal infection rate in 2018, it was found that different breeding parents (n=56) expressed a different resistance abilities to anthracnose with an infection rate ranging from 9.1% to 81.8%. Five breeding parents, including cx731, cx841, cx859, cx872, cx876, were preliminarily proved to be resistant to anthracnose at a relatively high level. These parents were important materials for the Chinese fir anthracnose-resistance breeding programs.

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New Records of Angiosperm Distribution in Fujian (Ⅸ)

AN Chang, NI Bi-yong, ZHUANG Yi-xue, CHEN Xin-yan, YANG Cheng-zi

2020, 49(03): 200-202. DOI: 10.3969/j.issn.1009-7791.2020.03.008

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During the scientific research of various plant survey projects carried out in recent years, five new records of plants in Fujian province were discovered, i.e. Vicia tetrasperma (L.) Schreber, Potentilla supina L., Rubus jianensis Yu et Lu, Chionographis nanlingensis L. Wu, Y. Tong & Q. R. Liu. All the vouchers specimens were preserved in Herbarium of Fujian University of Traditional Chinese Medicine (FJTCM) and Shanghai Chenshan Herbarium (CSH).

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Abrodictyum, a New Record of Hymenophyllaceae in Fujian Province

LIN Sheng, LIANG Hui, YANG Cheng-zi, MA Liang

2020, 49(03): 203-204. DOI: 10.3969/j.issn.1009-7791.2020.03.009

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A filmy species, Abrodictyum obscurum (Hymenophyllaceae), was firstly recorded in Fujian, southeastern China. This species and the genus Abrodictyum C. Presl were reported here as new records to the fern flora of Fujian. The vouchers specimens were preserved in Dendrological Herbarium, College of Forestry, Fujian Agriculture and Forestry University (FJFC).

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New Records of Vascular Plants in Jiangxi Province

YE Kang, XIONG Gang

2020, 49(03): 205-207. DOI: 10.3969/j.issn.1009-7791.2020.03.010

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Three species belonging to three genera in three families were reported as new records in Jiangxi Province, i.e. Sida spinosa L., Ipomoea fimbriosepala Choisy and Diodia teres Walter. The vouchers specimens were preserved in Shanghai Chenshan Herbarium (CSH).

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Color Characteristic and Plant Design of Edible Plants in Guangzhou

WU Hao-shu, YU Wen-xiang, ZHANG Zi-yuan, LI Zhi-yan, WU Xiao-tong, LI Zi-ruo, XIAN Li-hua

2020, 49(03): 208-214. DOI: 10.3969/j.issn.1009-7791.2020.03.011

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This research analyzed the color of 200 species (including varieties, forms or cultivars) edible plants and its color distribution in different seasons, so as to get the characteristics and limitations of edible plants in color. The results showed that the leaf and stem color of edible plants were mainly green, and the flower and fruit were colorful. According to the color characteristic, species were tested for planting collocation. Based on the test, there were 3 strategies for plant design of edible plants. First was the green edible plant collocation strategy for the characteristics of leaf color. Second was the multi-part color combination strategy for the color characteristics of different parts of edible plants. Third was the season strategy for the different color distribution and gaps in the temporal dimension of plants.

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Effects of Different Concentrations of Compound Fertilizer on Shoots and Cuttings of Pine Wood Nematode Resistant Mason Pine Picking Nursery

PAN Ting, CHEN Xue-lian, HAO Yan-ping, JIANG Chun-wu, WANG Song,WANG Jin-shan, CHEN Shi-juan, YU Xiao-song, CHENG Feng, WEI Qiang, XU Liu-yi

2020, 49(03): 215-219. DOI: 10.3969/j.issn.1009-7791.2020.03.012

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In order to study the effects of different concentrations of compound fertilizer on shoots and cuttings of pine wood nematode resistant Pinus massoniana nursery, three concentrations (2.5 g·L^-1, 5.0 g·L^-1 and 10.0 g·L^-1) of compound fertilizer were used to fertilize the picking nursery, and shoots were collected for cutting experiment. Results showed that compared with control, the application of compound fertilizer increased the number of sprouting shoots, rooting rate, the number of adventitious roots, the length of the longest adventitious root, total root length and the number of lateral roots. Different concentrations of compound fertilizer had different effects on the traits mentioned above. 2.5 g·L^-1 compound fertilizer increased the number of sprouts most significantly, an increase of 106% compared to the blank control, the difference reached a significant level (P<0.05); 5.0 g·L^-1 was the most conducive concentration to increasing the number of adventitious roots, total root length and the number of lateral roots, which were respectively higher than those of the control 100.0%, 189.1% and 186.4%, and the increase in total root length reached a extremely significant level(P<0.01), and the number of lateral roots reached a significant level; 10.0 g·L^-1 improved the rooting rate and the longest adventitious root length mostly, which were 23.2% and 134.7% higher than those of the control, respectively, and the increase of the longest adventitious root reached a extremely significant level. Comprehensive evaluation of 10 traits of shoots and their cuttings, the comprehensive target value of 10.0 g·L^-1 was the highest, which made it the best fertilization concentration among the three concentrations.

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Reflowering Time Regulation of Lagerstroemia indicain in Xiamen

ZHAN Fu-lin

2020, 49(03): 220-224. DOI: 10.3969/j.issn.1009-7791.2020.03.013

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To establish a technological system of Lagerstroemia indica reflowing regulation, six years old L. indica cultivated with root-controlling containers was used as the test material to study the effects of different pruning intensity and topdressing on its second blossom. The results showed that pruning and topdressing could promote the reflowering of L. indica. The most suitable treatment was pruning 4/5 of the new shoots after the first flower, applying 150-180 g AKANG compound fertilizer at the root once two weeks, spraying 500 times solution of Peters No.2 10-30-20 on the leaf once five days after bud emergence, and applying two kinds of fertilizer respectively. Full-bloom days, length of flower branch and number of inflorescences in this treatment were significantly higher than those in other treatments, the florescence days were at a higher level. During the period of flower control, 1000 times solution of acetamiprid and 800 times solution of Triadimefon were sprayed once two weeks, which could effectively control aphid, powdery mildew and soot disease of L. indica and ensure its normal flower bud differentiation.

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Herbal Textual Studies on Artemisia argyi and the Latest Research on Chemical Constituents and Antibacterial, Antiviral Activities of Artemisiae Argyi Folium

GENG Wen-hui, CHEN Liang-hua, GENG Xue-mei, LIN He-tong, MING Yan-lin

2020, 49(03): 225-233. DOI: 10.3969/j.issn.1009-7791.2020.03.014

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Artemisiae argyi folium is the dried leaves of Artemisia argyi of?genus Artemisia in family Compositae. Both traditional medicine and modern medicine believe that the artemisiae argyi folium has the effect of resisting microbial infection. In vitro, A. argyi leaves have a broad spectrum of antibacterial and antiviral activity; In vivo, moxibustion and moxa can regulate a variety of immune function cells and cytokines, and maintain the stability of the internal environment. Since the outbreak of novel corona virus pneumonia, artemisiae argyi folium has played an important role in the epidemic prevention and control, it has aroused wide attention of the whole society. In order to further study and develop the plant resources of A. argyi, this paper reviews the textual research, resource distribution, chemical composition, antiviral and antibacterial activities and application value of the artemisiae argyi folium.

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Advances in Research Methods and Monitoring Mechanism of Traditional Medicinal Plant Resources in China

ZHANG Jiang-ping, ZHAI Chuan-jia, LI Xin-rou, SONG Shu-yi, GENG Hui, ZHAO Peng, WANG Shao-ping, ZHANG Yong-qing, LI Jia, LIU Qian, ZHOU Jie, LIN Ying

2020, 49(03): 234-242. DOI: 10.3969/j.issn.1009-7791.2020.03.015

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Medicinal plants are an important part of traditional Chinese medicine resources. The survey method is the premise of resource survey work. Reasonable survey methods need to fully combine the characteristics of the survey objects with the expected objectives of the survey. This paper summarizes the applicability of traditional medicinal plant survey methods and the application value of hyper-spectral remote sensing and 5S integration technology in the investigation and study of medicinal plant resources by summarizing the characteristics of wild and cultivated medicinal plants in China and the problems in development and utilization. The leap-forward transformation of medicinal plant resources from mastering the total amount of resources to monitoring resources is of great significance to the modernization and sustainable development of Chinese medicine industry. Establishing a resource monitoring mechanism requires survey methods with high efficiency and high accuracy, and long-term operation. The establishment of satellite remote sensing dynamic monitoring platform and the statistical reporting system of modern Chinese medicine industry as a whole monitoring mechanism for medicinal plant resources in China has great application prospects.

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Resource Investigation of the Key National Protected Species Manglietia pachyphylla

MIAO Shen-yu, LUO Yu-qian, LAN Yang-hui, TANG Hai-ming, HUANG Jin-ling

2020, 49(03): 243-246. DOI: 10.3969/j.issn.1009-7791.2020.03.016

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Based on the field investigation of some natural distribution areas of national grade Ⅱ key protected wild plants Manglietia pachyphylla, combined with analysis of related literatures and databases, the taxonomical status, origin and habitat, specimen records, research progress and endangerous factors of this species were summarized.?Since the publication of M. pachyphylla in 1961, it has been more than 50 years. Its distribution area ranged from endemic to Guangdong to sharing with Guangxi. The M. pachyphylla population in Xinfeng Yunji Mountain Provincial Nature Reserve, Guangdong Province is lager, further north distribution and higher in elevation. Most populations of M. pachyphylla in Guangdong are declining populations, it is necessary to strengthen in situ and ex situ conservation, scientific research and education.

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