Pseudomonas intra-genus competition determines the protective function of synthetic bacterial communities in Arabidopsis thaliana.

ABSTRACT: The plant root microbiota is crucial for nutrient acquisition, development, and disease suppression. Although commensal bacteria display host preference, their beneficial impact on their cognate host and mechanisms of species selection by the plant are still unclear. We use bacterial culture collections derived from the two model species Arabidopsis thaliana (At) and Lotus japonicus (Lj) to design synthetic communities (SynComs) and test their protective function upon exposure of At Col-0 to the detrimental root-colonizing At-derived Pseudomonas isolate R401. Lj-derived SynComs were fully protective, whereas At-derived SynComs displayed full protective activity only towards a R401 mutant impaired in the production of inhibitory exometabolites. The protective phenotypes were associated with

SUBMITTER: Amrhein A 

PROVIDER: S-EPMC12262851 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature