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Foliar Spraying of Chlorpyrifos Triggers Plant Production of Linolenic Acid Recruiting Rhizosphere Bacterial Sphingomonas sp.

文献类型： 外文期刊

作者： Li, Yong 1 ; Feng, Fayun 1 ; Mu, Qi'er 1 ; Li, Mei 1 ; Ma, Liya 1 ; Wan, Qun 1 ; Jousset, Alexandre 5 ; Liu, Changhong 4 ; Yu, Xiangyang 1 ;

作者机构： 1.Minist Sci & Technol, Jiangsu Key Lab Food Qual & Safety, State Key Lab Cultivat Base, Nanjing 210014, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Food Safety & Nutr, 50 Zhongling St, Nanjing 210014, Peoples R China

3.Yancheng Teachers Univ, Sch Wetlands, Jiangsu Key Lab Bioresources Saline Soils, Yancheng 224002, Peoples R China

4.Nanjing Univ, Sch Life Sci, State Key Lab Pharmaceut Biotechnol, Nanjing 210023, Peoples R China

5.Nanjing Agr Univ, Jiangsu Collaborat Innovat Ctr Solid Organ Waste R, Natl Engn Res Ctr Organ based Fertilizers, Joint Int Res Lab Soil Hlth,Jiangsu Prov Key Lab O, Nanjing 210095, Peoples R China

关键词： bacterial community; root exudates; Sphingomonas; pesticides; chlorpyrifos; recruitment

期刊名称：ENVIRONMENTAL SCIENCE & TECHNOLOGY （ 影响因子：11.4； 五年影响因子：12.0 ）

ISSN： 0013-936X

年卷期： 2023 年 57 卷 45 期

页码：

收录情况： SCI

摘要： Plants have developed an adaptive strategy for coping with biotic or abiotic stress by recruiting specific microorganisms from the soil pool. Recent studies have shown that the foliar spraying of pesticides causes oxidative stress in plants and leads to changes in the rhizosphere microbiota, but the mechanisms by which these microbiota change and rebuild remain unclear. Herein, we provide for the first-time concrete evidence that rice plants respond to the stress of application of the insecticide chlorpyrifos (CP) by enhancing the release of amino acids, lipids, and nucleotides in root exudates, leading to a shift in rhizosphere bacterial community composition and a strong enrichment of the genus Sphingomonas sp. In order to investigate the underlying mechanisms, we isolated a Sphingomonas representative isolate and demonstrated that it is both attracted by and able to consume linolenic acid, one of the root exudates overproduced after pesticide application. We further show that this strain selectively colonizes roots of treated plants and alleviates pesticide stress by degrading CP and releasing plant-beneficial metabolites. These results indicate a feedback loop between plants and their associated microbiota allowing to respond to pesticide-induced stress.

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