Bacillus velezensis SQR9-Emitted Volatiles Enhance Arabidopsis Salt Tolerance via ROS Scavenging and Ion Transport Regulation.

ABSTRACT: Salinity stress severely limits crop productivity worldwide. While plant growth-promoting rhizobacteria (PGPR) are known to alleviate abiotic stress, the specific mechanisms mediated by their volatile organic compounds (VOCs) remain largely elusive. In this study, an in vitro split-plate system was used to investigate the effects of VOCs emitted by Bacillus velezensis SQR9 on Arabidopsis thaliana seedlings under salt stress. Exposure to SQR9 VOCs significantly enhanced Arabidopsis salt tolerance, evidenced by increased biomass and root growth. Mechanistically, SQR9 VOCs mitigated salt-induced damage by increasing chlorophyll content, modulating osmolytes, and reducing malondialdehyde (MDA) levels. SQR9 VOCs alleviated oxidative stress by decreasing ROS (H₂O<

SUBMITTER: Li Y 

PROVIDER: S-EPMC12845509 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature