Enantioselective effects of imazethapyr residues on Arabidopsis thaliana metabolic profile and phyllosphere microbial communities  

作　　者：Qianqiu Zhao Wanyue Liu Yan Li Mingjing Ke Qian Qu Wenting Yuan Xiangliang Pan Haifeng Qian 

机构地区：[1]Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China [2]College of Environment,Zhejiang University of Technology,Hangzhou 310032,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Environmental Sciences》2020年第7期57-65,共9页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21777144,21976161);the CAS Pioneer Hundred Talents Program(H.F.Qian);the Xinjiang Uighur Autonomous Region Talent Project(H.F.Qian)。

摘　　要：Imazethapyr(IM)is a widely used acetolactate synthase-inhibiting chiral herbicide.It has long-term residuals that may be absorbed by the human body through the edible parts of plants,such as vegetable leaves or fruits.Here,we selected a model plant,Arabidopsis thaliana,to determine the effects of R-IM and S-IM on its leaf structure,photosynthetic efficiency,and metabolites,as well as the structures of microorganisms in the phyllosphere,after 7 days of exposure.Our results indicated enantiomeric differences in plant growth between R-IM and S-IM;133μg/kg R-IM showed heavier inhibition of photosynthetic efficiency and greater changes to subcellular structure than S-IM.R-IM and S-IM also had different effects on metabolism and leaf microorganisms.S-IM mainly increased lipid compounds and decreased amino acids,while R-IM increased sugar accumulation.The relative abundance of Moraxellaceae human pathogenic bacteria was increased by R-IM treatment,indicating that R-IM treatment may increase leaf surface pathogenic bacteria.Our research provides a new perspective for evaluating the harmfulness of pesticide residues in soil,phyllosphere microbiome changes via the regulation of plant metabolism,and induced pathogenic bacterial accumulation risks.

关 键 词：Arabidopsis thaliana ENANTIOSELECTIVITY Chiral herbicides Leaf metabolism Phyllosphere microorganism 

分 类 号：X592[环境科学与工程—环境工程] X172