Arabidopsis root defense barriers support beneficial interactions with rhizobacterium Pseudomonas simiae WCS417.

ABSTRACT: Plant roots interact with pathogenic and beneficial microbes in the soil. While root defense barriers block pathogens, their roles in facilitating beneficial plant-microbe associations are understudied. Here, we examined the impact of specific root defense barriers on the well-known beneficial association between Arabidopsis thaliana and the plant growth-promoting rhizobacterium Pseudomonas simiae WCS417. Using 15 Arabidopsis mutants with alterations in structural (cutin, suberin, callose, and lignin) and chemical (camalexin and glucosinolates) defense barriers, we demonstrate that some barriers impact WCS417-mediated plant growth responses and its root colonization. Root exudates from Arabidopsis wild-type (WT) and mutant plants differentially affected the WCS417 transcriptome, with camal

SUBMITTER: Zhou J 

PROVIDER: S-EPMC12529037 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature