Archive

30 August 2021, Volume 50 Issue 04 Previous Issue    Next Issue
---
Plant physiology and biochemistry
Plant ecology, resources and taxonomy
Review


For Selected:

Download Citations EndNote Ris BibTeX

Toggle Thumbnails

Plant physiology and biochemistry

Select

In vitro Flowering and Basic Physiological Research of Cymbidium goeringii × Cymbidium ‘Han Xiang Mei’ ZENG Yan-hua, LONG Qiang-yu, HE Jing-zhou, LI Xiu-ling, FAN Ji-zheng, BU Zhao-yang 2021, 50(04): 245-250.  DOI: 10.3969/j.issn.1009-7791.2021.04.001 Abstract ( )   PDF (421KB) ( )   The study on the in vitro flowering of the hybrids Cymbidium goeringii×Cymbidium ‘Han Xiang Mei’ was implemented. The effects of cytokinin (TDZ/6-BA) and inorganic salt concentration (P, K) on the induction of flower in vitro were studied by single factor experiment with agar 4 g·L-1+sucrose 20 g·L-1+coconut milk 100 mL·L-1 on the basis of MS medium physiological and biochemical indexes (protein, soluble total sugar, superoxide dismutase) and hormone (IAA, ABA) levels during the flower bud induction were measured. The results showed that the induction rate of flower bud was the highest with 0.2 mg·L-1 TDZ and 2 mg·L-1 6-BA, 14.33% and 14.00% respectively. The highest induction rates of 3P/3K and 3P/5K of inorganic salts were 16.67% and 11.33% respectively. The optimum medium caused the flower bud induction rate up to about 34%. The formula was as follows: MS (3P, 3K)+TDZ 0.2 mg·L-1+coconut milk 100 mL·L-1+agar 4 g·L-1+sucrose 20 g·L-1. Results of physiological and biochemical indexes showed that the contents of soluble protein, soluble total sugar and SOD activity were positively correlated with flower bud induction rate. The stability of endogenous hormone IAA and ABA content was beneficial to flower bud induction, but too much might inhibit the induction of flower buds. References | Related Articles | Metrics

Select

Chlorophyll Content and Photosynthetic Efficiency of Thuidium kanedae at Different Altitudes TANG Lu-yan, 2021, 50(04): 251-256.  DOI: 10.3969/j.issn.1009-7791.2021.04.002 Abstract ( )   PDF (363KB) ( )   Using Thuidium kanedae as the test material, which were collected at different altitudes from 1500 m to 3100 m of Baihualing, Gaoligong Mountain, Yunnan province, the chlorophyll content and actual photosynthetic quantum yield (YⅡ) were compared and the variation characteristics of photosynthetic characteristics were studied. The results showed that Y(Ⅱ) was negatively correlated with the content of total chlorophyll, chlorophyll a, chlorophyll b, and the ratio of chlorophyll a/b. In addition, the trends of the total chlorophyll content, chlorophyll a content and chlorophyll b content all showed a unimodal distribution pattern, which increased first and then decreased with the increase of altitude. However, with the further increase of altitude, the change of total chlorophyll content and chlorophyll a content was not obvious, while the chlorophyll b showed an obvious upward trend. The ratio of chlorophyll a/b showed a unimodal distribution pattern at low altitude, and then decreased slowly with the increase of altitude. The Y(Ⅱ) showed an increasing trend with the increase of altitude as a whole, and showed a sharp upward trend at high altitude. The results of this study will provide references for revealing the physiological mechanisms of bryophytes adapting to the ecological environment under different altitude gradients. References | Related Articles | Metrics

Select

Responses of Chlorophyll Fluorescence Parameters and SPAD Value in Leaves of Bombax ceiba to Drought NI Jian-zhong, LUO Qian, CHEN Xiao-yu, DAI Se-ping, WANG Wei 2021, 50(04): 257-261.  DOI: 10.3969/j.issn.1009-7791.2021.04.003 Abstract ( )   PDF (281KB) ( )   Four different gradients of drought stress were carried out on one-year-old seedlings of Bombax ceiba by potted simulation drought. The Chlorophyll SPAD value and fluorescence parameters in leaves of seedlings were measured. The results showed that the SPAD reduced slowly with the degree of drought stress increasing, the parameters of initial fluorescence (Fo) showed a rising trend, while maximum fluorescence (Fm), potential activities of PSⅡ (Fv /Fo), maximum photochemical efficiency of PSⅡ (Fv /Fm), photochemical quenching (qP) and relative photosynthetic electron transport rate (ETR) decreased, and they had significant difference under moderate and severe drought stress from slight drought stress and control (P<0.05). But non-photochemical quenching (NPQ) change was not significant among these treatments. With the drought stress increased, the photo-inhibition appeared, B. ceiba could improve adaptability by reducing photochemical quenching coefficient and improving thermal dissipation. References | Related Articles | Metrics

Select

Analysis of Total Flavonoids in Moutan Cortex from Different Sources CHENG Dan-dan, LUO Xiao, WANG Shi-yue, LUO Zhen-hui, YUAN Wen-peng 2021, 50(04): 262-266.  DOI: 10.3969/j.issn.1009-7791.2021.04.004 Abstract ( )   PDF (324KB) ( )   Single factor test and response surface methodology were used to optimize the extraction process of total flavonoids of moutan cortex (Paeonia suffruticosa root cortex) from wild and cultivated plants in different areas, and the flavonoid content was determined by UV spectrophotometer. The results showed that the optimum conditions of extraction were as follows: solid-liquid ratio 1:50 (g/mL), ethanol concentration 50%, extraction temperature 64 ℃, ultrasonic time of 65 min. The total flavonoids content varied from sources. The total flavonoids content of moutan cortex was the highest 64.035 mg·g -1 from Shangluo and Lüeyang, Shaanxi province, and the least 30.439 mg·g -1 from Kunming, Yunnan province. References | Related Articles | Metrics

Plant ecology, resources and taxonomy

Select

HPLC Fingerprinting of Anoectochilus roxburgii LI Yi-yi, LIU Shun-zhi, XIE Ting-ting, FAN Shi-ming, QIU Ying-kun 2021, 50(04): 267-271.  DOI: 10.3969/j.issn.1009-7791.2021.04.005 Abstract ( )   PDF (366KB) ( )   In this experiment, the fingerprints of common cultivated and wild Anoectochilus roxburgii including 14 batches of herbs from different sources were established by high performance liquid chromatography (HPLC) with gradient elution using acetonitrile-formic acid aqueous solution as the mobile phase. The results showed that the HPLC fingerprint of A. roxburgii confirmed 24 common peaks including 6 common peaks of kinsenoside and trigonelline, rhamnetin-3-O-rutinoside, quercetin, kaempferol, isorhamnetin and batatasin-III. Except for 3 batches of medicinal materials, the similarity of the other 11 batches was higher than 0.910, and the similarity was generally good. The similarity of Goodyera hachijoensis only reached 0.529, 0.721, and 0.698, all of which were lower than the similarity within 14 batches of A. roxburgi. Based on the similarity evaluation, it was concluded that differences existed between A. roxburgii and G. hachijoensis. The results provide a reference for the analysis and evaluation of the differences between A. roxburgii and G. hachijoensis. References | Related Articles | Metrics

Select

Adsorption Behavior of Modified Chitosan Bamboo Charcoal on Cu LIN Xiao--yu, YAO Jun-bing 2021, 50(04): 272-277.  DOI: 10.3969/j.issn.1009-7791.2021.04.006 Abstract ( )   PDF (335KB) ( )   To improve the remediation ability of bamboo charcoal on heavy metal pollution in wastewater, a novel magnetic chitosan modified bamboo charcoal composite adsorbent was designed and synthesized by crossing-linking method. The structure of compound adsorbent was characterized by Fourier transform infrared spectroscopy (FTIR). At the same time, the effects of different initial Cu2+ concentration, adsorbent dosage, adsorption time, pH value and temperature on Cu2+ adsorption rate were studied. The results showed that the adsorption efficiency had a positive effect on the initial concentration of Cu2+ and the dosage of adsorbent; The adsorption equilibrium time was about 8 h; Within the range of temperature treatment, the adsorption efficiency increased with the increase of temperature; When pH was 7, the adsorption rate was the highest and the effect was the best. Under the condition of oscillation, the adsorption effect was better than that of static treatment. The results provided a basis for the advanced treatment of heavy metals in wastewater and the protection of water environment. References | Related Articles | Metrics

Select

Succession Dynamics of Plant Community in Yangmeikeng Mountain, Shenzhen LEI Jin-man, HUANG Yu-yuan, SUN Ying-fang, YANG Zhi-ming, YU Xin-fan, SUN Shuang-shuang 2021, 50(04): 278-289.  DOI: 10.3969/j.issn.1009-7791.2021.04.007 Abstract ( )   PDF (421KB) ( )   Taking two plant communities in Yangmeikeng mountain in Shenzhen as the survey object, the changes of species composition, species diversity characteristics and important values of the community were analyzed, and the succession dynamic pattern of plant community in different stages was discussed. The results showed that after 7 years of succession, the richness of the two plant communities increased, and the species composition in the two plant communities differ significantly. The natural landscapes of the two plant communities are also different in different periods. In the community family, genus, species of the quantitative composition, the difference is obvious. The original Schefflera octophylla–Psychotria–Adiantum capillus-veneris community was composed of 26 families, 36 genera, 39 species in 2013, and 19 families, 29 genera, 30 species in 2018, and a total of 32 families, 51 genera, 61 species in 2019; the original Machilus velutina–Fissistigma oldhamii–Adiantum capillus-junonis community was composed of 25 families 30 genera 33 species in 2013, a total of 24 families 33 genera 33 species in 2018, and a total of 42 families 67 genera 83 species in 2019. The species diversity index and Pielou evenness index of tree layers, shrub layers and herbaceous layers in both plant communities almost decreased first and then increased. The species composition of trees, shrubs, and herbaceous layers in the succession series showed the tendency of shade-tolerant species to replace shaded-intolerant species, and the hierarchy of plant community changes from simple to complex. References | Related Articles | Metrics

Select

Wild Poisonous Plant Resources in Wugongshan Region, China ZHANG Fan-jing, ZHOU Wen, YAN Jing-ru, CHEN Jia-bei, CHEN Gong-xi 2021, 50(04): 290-300.  DOI: 10.3969/j.issn.1009-7791.2021.04.008 Abstract ( )   PDF (414KB) ( )   In order to understand the situation and toxicity characteristics of poisonous plant resources in Wugongshan region, effectively protect and utilize the poisonous plant resources in Wugongshan region, the poisonous plants in this area were statistically analyzed by means of preliminary field investigation and literatures. The survey results showed that there were 240 species of poisonous plants in the Wugongshan region, belonging to 179 genera in 75 families; a number of dominant families (including 10 species or more), dominated by 4 families of Leguminosae, Ranunculaceae, Asteraceae and Liliaceae had been formed. A number-dominant genera dominated by Corydalis (including 5 species and more). The living habits of poisonous plants in this area were mainly herbs; the plants in the area of 400—499 m above sea level were the most, and they mainly grown in hillsides, forests, shrubs and other environments. The floristic components were complex and diverse. The families were mainly distributed in Pantropic and Cosmopolitan, the genera were mainly distributed in North Temperature and Pantropic, and the species were Endemic to China and East Asia. The toxicity was mainly small, and the toxic part was mainly toxic in the whole plant; the toxic chemical composition was quite complex, mainly alkaloids, and the toxicological types were mainly neurotoxic. References | Related Articles | Metrics

Select

Changes of Bryophyte Diversity in Karst Rocky Desertification Area DAI Li-hua, YI Wu-ying, ZHAN Tian-li, PENG Xi, TANG Jin-gang 2021, 50(04): 301-308.  DOI: 10.3969/j.issn.1009-7791.2021.04.009 Abstract ( )   PDF (313KB) ( )   In order to reveal the species diversity of bryophytes in karst rocky desertification areas, the field investigation on mosses in karst areas with different degrees of rocky desertification from Guizhou province were carried out. The main research results were as follows. Along with the increase of rocky desertification degree, the number of bryophyte family, genus and species declined. Among them, the number of mosses families of intense rocky desertification was the least and significantly lower than those of other three types of rocky desertification areas. The number of families in intensity rocky desertification areas was lesser than those of potential, mild, moderate rocky desertification, reduced 70.00%, 57.14%, 33.33%, respectively. Bryaceae, Brachytheciaceae, Pottiaceae and Dicranaceae were the dominant families in mild rocky desertification in terms of the number of subordinate genus, which accounted for the total number 34.62%. Shannon-Wiener and Simpson indices were basically decreased with the intensification of rocky desertification. The Shannon-Wiener index of bryophyte in the potential rocky desertification area was 1.9393, higher than the other three rocky desertification areas was 43.97%, higher than the other three rocky desertification areas. Simpson index from mild to moderate rocky desertification decreased fastest by 26.73%. The amount of moss in potential rocky desertification was higher than that in the other three areas.?The results showed that the amount of mosses was closely related to the degree of rocky desertification. With the increase of the degree of rocky desertification, the total number of families, genera and species of bryophytes decreased to different degrees. References | Related Articles | Metrics

Select

Two New Records of Angiosperms in Guangdong Province WANG Tao, MAO Zhi-wei, WANG Ji-yu, XIE Wei-li, HOU Xue-liang 2021, 50(04): 309-312.  DOI: 10.3969/j.issn.1009-7791.2021.04.010 Abstract ( )   PDF (344KB) ( )   During the investigation of island plants in Daya Bay, two new records of angiosperms in Guangdong Province, including Glycosmis craibii var. glabra (Craib) Tanaka in Rutaceae and Adinandra howii Merrill & Chun in Theaceae were discovered. The voucher specimens were held in Herbarium of Xiamen University (AU). These new records not only enriched the data of plant diversity of Guangdong Province, but also provided basic data for the study of island plants. References | Related Articles | Metrics

Select

New Distribution of Wild Thelephora ganbajun M. Zang in China YAN Sheng-ze, LUO Qing-qing, YE Kai-wun, WANG Ai-qin, ZHAN Mei-rong 2021, 50(04): 313-317.  DOI: 10.3969/j.issn.1009-7791.2021.04.011 Abstract ( )   PDF (610KB) ( )   Thelephora ganbajun M. Zang is the prestigious edible mushroom specifically grown in China. According to the past reports, it was an endemic species distributed in Yunnan province. Our present work demonstrated that two new collected specimens recently found in Sanming, Fujian and Nantou, Taiwan respectively were identified as Thelephora ganbajun M. Zang through the morphological characters and ITS sequence analysis. The discovery provided new information to validate the new biological distribution area for ganbajun mushroom in China. The phylogenetic relationship and the geographic distribution study revealed that the distribution of ganbajun was not only appearing in Yunnan province, but distributed in the region of 21 degree to 27 degree North Latitude. References | Related Articles | Metrics

Select

Pathogen Identification and Fungicide Screening of Dendrobium officinale Rust Disease LUO Kai, LI Ze-sheng, JIANG Yan, JIA Min, GAO Yan, GENG Xiu-ying, LI Gui-lin 2021, 50(04): 318-322.  DOI: 10.3969/j.issn.1009-7791.2021.04.012 Abstract ( )   PDF (331KB) ( )   This paper aimed to identify the pathogen causing Dendrobium officinale rust disease and obtain effective fungicides against the disease. The disease investigation and pathogenic identification were carried out in field and laboratory in Ruili County, Yunnan Province. Field efficacy trials were conducted to investigate control efficacy of 4 fungicides against D. officinale rust disease. The results showed that the D. officinale rust disease was caused by Coleosporium sp. Urediospores of the rust directly infected the leaves of D. officinale, and it occurred from February to November every year. Control effects of benzyl·propiconazole 10% SC at 450 mL·hm-2 and trifloxystrobin·tebuconazole 75% WG at 300 g·hm-2 were significantly better than those of the other two fungicides, with the efficacies of 82.16% and 82.88% after treatment 3 times, respectively. The two fungicides could be used as chemicals to control the disease. References | Related Articles | Metrics

Review

Select

Resources of Camellia Sect. Theopsis and Sect. Eriandria and Germplasm Innovation ZHANG Ya-li, DU Cheng, HU Yong-hong 2021, 50(04): 323-332.  DOI: 10.3969/j.issn.1009-7791.2021.04.013 Abstract ( )   PDF (412KB) ( )   The genus Camellia has rich resources for tea, oil and ornamental plants. Resources of Camellia Sect. Theopsis and Camellia Sect. Eriandria had been paid more and more attention with developments of their ornamental values. The progress based on germplasm and innovation of these two sections was as follows. 1) There were 3 main taxonomy studies on the genus Camellia, including Ming T L, Zhang H T and Sealy R J. According to Zhang’s taxonomy system, there were 48 species of Sect. Theopsis and 15 species of Sect. Eriandria, while there were 19 species and 9 species separately according to Ming’s taxonomy system. 2) The abundant flowers and small leaves of these two sections were amazing ornamental characters for landscaping; in addition, some species were fragrant, the volatile components of flowers include phenylethyl alcohol, linalool, cedrol et al. 3) About 10 species in Sect. Theopsis and 1～2 species in Sect. Eriandria had been used for cluster-flowering camellias breeding. From the current research, germplasm on these two sections need to be further studied, so as to lay the foundation for the related researchers; at the same time, the germplasm innovation of these two sections needs to pay more attention to resources native to China and their distinguished characteristics on resistance or namental, so as to improve the cluster-flowering camellias application in landscapes. References | Related Articles | Metrics