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Analysis of spatiotemporal variations in the characteristics of soil microbial communities in castanopsis fargesii forests

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Journal of Forestry Research 2020年第5期31卷 1975-1984页

作者： Hongyong Qiao Yaning Luan Bing Wang Wei Dai Mengsai Zhao College of Forestry Beijing Forestry UniversityQinghua East Road No.35Haidian DistrictBeijing 100083People’s Republic of China Research Institute of Forest Ecology Environment and ProtectionChinese Academy of ForestryBeijing Summer Palace and the red flagHaidian DistrictBeijing 100091People’s Republic of China

castanopsis fargesii is a good afforestation plants and various microorganisms play important roles in mediating the growth and ecological functions of this *** this study,we evaluated changes in microbial communities in soil samples from *** *** phospholipid fatty acid(PLFA)biomarker method was used to obtain bacteria,fungi,actinomycetes,gram-positive bacteria(G?),gram-negative bacteria(G-),aerobic bacteria,and anaerobic bacteria to investigate spatiotemporal changes in microbial communities during the growing *** results show that soil microorganisms were mainly concentrated in the upper 20-cm layer,demonstrating an obvious surface aggregation(P<0.05).Large amounts of litter and heavy rainfall during the early growing season resulted in the highest PLFA contents for various microorganisms,whereas relatively low and stable levels were observed during other *** dominant species during each period were bacteria.G+ or aerobic bacteria were the main bacterial populations,providing insights into the overall trends of soil bacterial PLFA *** to the relative accumulation of refractory substances during the later stages of litter decomposition,the effects of fungi increased ***,our findings demonstrate that the main factors influencing microbial communities were litter,rainfall,and soil field capacity.

关键词： castanopsis fargesii Phospholipid fatty acids Soil microbial community Spatiotemporal variations

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Analysis of Genetic Structure of Natural Populations of castanopsis fargesii by RAPDs

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Acta Botanica Sinica 2002年第11期44卷 1321-1326页

作者：朱其慧潘惠新诸葛强尹佟明邹惠渝黄敏仁南京林业大学林木遗传和基因工程重点实验室南京210037

Genetic diversity and population genetic structure in 188 individuals from five natural populations of Castampsis fargesii Franch. were studied by RAPD markers. Three hundred and eighty-five loci were identified with 41 oligonucleotide primers, out of which 157 loci were polymorphic and accounted for 40.78% of total genetic diversity at species level. Shannon's indices of diversity (I) and Nei's gene diversity ( h) were 0.459 7 and 0.296 at the species level, respectively. The result showed that genetic variation of C. fargesii populations mainly existed within populations. Genetic differentiation (Hsp-hpop)/Hsp estimated with Shannon's index of diversity and coefficient of gene differentiation (Gst) were 0.047 6 and 0.042 9 respectively, which were confirmed by the analysis of molecular variance (AMOVA). Therefore, it is apparent that within-population variation accounted for 94.97% and among-populations variation accounted for only 5.03% of the total genetic diversity. AMOVA also indicated that there was significant differentiation among populations as well as among individuals within a population.

关键词： castanopsis fargesii natural populations RAPD genetic structure

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