The <i>Pseudomonas putida</i> type VI secretion systems shape the tomato rhizosphere microbiota.

ABSTRACT: Bacterial competition mechanisms drive microbial community dynamics across diverse ecological niches. The type VI secretion system (T6SS) represents a sophisticated nanomachine used by Gram-negative bacteria for contact-dependent elimination of competitors through the delivery of toxic effectors. While the T6SS has been well-documented in mammalian gut microbiota development, its role in shaping plant rhizosphere communities remains poorly understood despite the ecological importance of rhizosphere microbiota. This study investigates how the three Pseudomonas putida KT2440 T6SS clusters influence the tomato rhizosphere microbiota in agricultural soil. Through comprehensive in vitro and in vivo analyses, we demonstrate that while the K2/K3-T6SSs remain inactive under st

SUBMITTER: Vazquez-Arias D 

PROVIDER: S-EPMC12482989 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature