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

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...

Full description

Saved in:
Bibliographic Details
Published in:Environmental science & technology 2023-11, Vol.57 (45), p.17312-17323
Main Authors: Li, Yong, Feng, Fayun, Mu, Qi’er, Li, Mei, Ma, Liya, Wan, Qun, Jousset, Alexandre, Liu, Changhong, Yu, Xiangyang
Format: Article
Language:English
Subjects:
Amino acids
Bioremediation and Biotechnology
Chlorpyrifos
Community composition
Exudates
Exudation
Feedback loops
Foliar applications
Insecticides
Linolenic acid
Lipids
Metabolites
Microbiota
Microorganisms
Nucleotides
Oxidative stress
Pesticide application
Pesticides
Plant production
Rhizosphere
Roots
Soil ecology
Soil microorganisms
Sphingomonas
Spraying
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0013-936X
1520-5851
DOI:10.1021/acs.est.3c04593