Effects of Phthalic Acid Esters(PAEs)on Rhizosphere Microbial Communities of Different Plants
[Objective]The interaction between phthalic acid esters(PAEs)and different rhizosphere microbial communities was investigated to provide theoretical basis for PAEs management.[Method]Four plant rhizosphere soil samples(chestnut,maize,tobacco and pine)taken from Xundian,Yunnan Province were used as study objects.High throughput sequencing technology was used to analyze the community structure and diversity of rhizosphere microorganisms in different plants.The interaction relationship between the community structure of rhizosphere microorganisms and environment was analyzed by RDA.[Result]There was little difference in rhizosphere soil microbial species among different plants.In addition,the microbial community structure and composition of rhizosphere soil of four different plant species were significantly different with different levels of PAEs pollution.The diversity index showed as tobacco>maize>chestnut>pine.The dominant phylum in rhizosphere soil of pine was Acidobacteria(38.43%)and Proteobacteria(32.29%),while the dominant phylum of chestnut was Proteobacteria(47.77%)and Acidobacteria(13.48%)and Gemmatimonadetes(4.30%).Acidobacteria(34.51%)was the dominant phylum of maize,while Proteobacteria(52.87%)was the dominant phylum of tobacco.DOP,DEP and DEHP were the main environment factors affecting the community distribution of Escherichia,Gemmatimonas and Bacteroides in soil.[Conclusion]The PAEs content in rhizosphere soil of different plants varied greatly.Different types of PAEs in soil significantly affected the microbial community structure of plant rhizosphere soil.