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Spatiotemporal distribution patterns and drivers of bacterial communities in the rhizosphere and bulk soil under an Abies fabri forest on Gongga Mountain(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

2021 05
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Spatiotemporal distribution patterns and drivers of bacterial communities in the rhizosphere and bulk soil under an Abies fabri forest on Gongga Mountain
XIONG Wenjun1 2 ZHU He3 LI Jiabao1 XIE Ting1 WU Yanhong3 & LI Xiangzhen1?
1 Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China 2 University of Chinese Academy of Sciences, Beijing 100049, China 3 Chengdu Institute of Mountain Hazard and Environment, Chinese Academy of Sciences, Chengdu 610041, China
mountain ecosystem Abies fabri rhizosphere soil bulk soil elevation season bacterial community

The study of spatial patterns in soil microbial communities in mountain ecosystems has received much attention. However, elevational and seasonal patterns and environmental drivers of bacterial communities associated with the plant rhizosphere remain understudied. In this work, we collected 72 soil samples from a subalpine dark coniferous forest at four elevations on Gongga Mountain in May, August, and October 2017. We then studied the distribution patterns and drivers of soil bacterial community composition and diversity using MiSeq sequencing. The results indicated that bacteria in the genera Variibacter (5%), Acidothermus (4.2%), Afipia (2.5%), Bryobacter (2.5%), Acidibacter (1.6%), Isosphaera (1.5%), Rhizomicrobium (1.2%), and Granulicella (0.02%), as well as the species Candidatus Soilbacter (0.05%), were dominant in both the Abies fabri rhizosphere and bulk soil. Bacterial a diversity in both types of soil increased from 2 800 m to 3 200 m and decreased from 3 200 m to 3 500 m. There was a significant correlation between the α diversity of bacterial community and soil pH (r = 0.81, P = 0.001). In addition, there was no significant difference in the structure of the bacterial community in the rhizosphere and bulk soil. Overall, our findings revealed the spatiotemporal dynamics of bacteria associated with plant root in subalpine forest soils and may provide data-based support for a comprehensive understanding of microbial distribution in this ecosystem.


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Last Update: 2021-10-25