Characteristics and main influencing factors of plant rhizospheric microbial communities in riparian zone along the project of water diversion from Yangtze River to the Chaohu Lake
Rhizospheric microbes of plants play an important role in the rhizosphere ecosystem in the riparian zone.In order to understand the characteristics and main influencing factors of plant rhizospheric microbial communities before the operation of the project of water diversion from Yangtze River to the Chaohu Lake(Caizihu line),a systematic survey of plant rhizospheric microbial communities and environmental factors in four different regions along this project was con-ducted.The results showed that a total of 75 phyla(3 phyla of archaea and 72 phyla of bacteria)of rhizospheric microbes were detected in the whole survey area,of which 25 phyla were dominant,and the Proteobacteria,Bacteroidetes,and Acidobacteria were the most abundant.Although there were significant differences in the composition of rhizospheric mi-crobial communities among the four regions,they were still mainly composed of Proteobacteria,Bacteroidetes,Acidobac-teria,or Actinobacteria.The results of one-way ANOVA showed that there were significant differences in Chao1,Shan-non,and Goods coverage index of rhizospheric microbes in the four regions,among which Chao1 and Shannon index were the lowest in the Chaohu Lake and Baishitianhe River regions.Redundancy analysis showed that substrate pH and organic matter mass fraction were the main environmental factors affecting the rhizospheric microbial community structure along the project.This study revealed the community structure and spatial variation of plant rhizospheric microbial com-munity structure before the operation of the project of water diversion from Yangtze River to the Chaohu Lake for the first time.The relevant results can provide background data for the subsequent evaluation of the impact of the operation of this project on the rhizospheric microbial communities.
rhizospheric microbethe project of water diversion from Yangtze River to the Chaohu Lakediversitycommunity structure