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基于高通量测序技术的“毛竹+茶树”立体生态模式下茶树根际土壤微生物群落结构的特征研究

Study on Characteristics of Soil Microbial Community Structure in Rhizosphere of Tea Plants under “Phyllostachys edulis+Camellia sinensis” Three-dimensional Ecological Model Based on High-throughput Sequencing Technology

  • 摘要: 采用高通量测序技术分析原毛竹密度+茶树(HLL)、60%毛竹密度+茶树+不施肥(NS)和60%毛竹密度+茶树+施肥(S)3个处理下的根际土壤微生物群落结构特征,探究“毛竹+茶树”立体生态模式对茶树根际土壤微生物群落结构的影响。结果表明:(1)HLL处理的根际土壤微生物群落的OTUs数量高于其他处理,土壤细菌多样性以S处理为最高,土壤真菌多样性以HLL处理最高,3个处理的土壤微生物群落总体丰度和多样性无显著差异。(2)3组土壤样品的细菌优势门均为变形菌门、酸杆菌门,真菌优势门均为子囊菌门、担子菌门;β多样性和LEfSe分析表明,3组土壤样品的土壤细菌和真菌群落结构存在显著差异。(3)造成土壤细菌差异的指示类群主要为变形菌门、放线菌门、厚壁菌门、拟杆菌门等,而真菌差异指示类群主要为子囊菌门、担子菌门。

     

    Abstract: To explore the characteristics of soil microbial community structure in the rhizosphere of tea plants under the “Phyllostachys edulis forest + tea tree” three-dimensional ecological model, this study used high-throughput sequencing technology to analyze the rhizosphere soil microbial community structure of three treatments including original bamboo forest density + tea tree (HLL), 60% bamboo forest density + tea tree + no fertilization (NS), and 60% bamboo forest density + tea tree + fertilization (S). The results showed that: (1) The number of OTUs in the rhizosphere soil microbial community of the HLL group was higher than that of the other two treatments. There was no significant difference in the overall abundance and diversity of microbial communities among the three groups of soil samples. (2) The dominant bacterial phyla in all three groups of soil samples were Proteobacteria, Acidobacteria and Actinobacteria, while the dominant fungal phyla were Ascomycota and Basidiomycota.β-diversity and LEfSe analyses indicated that there were significant differences in the soil bacterial and fungal community structures among the three groups. (3) The bacterial indicator taxa causing differences were mainly Proteobacteria, Actinobacteria, Firmicutes, and Bacteroidetes, while the fungal indicator taxa were mainly Ascomycota and Basidiomycota.