Pseudomonadota bridge cross-trophic interactions to suppress plant pathogens.

ABSTRACT: Trait-mediated interactions across trophic levels drive trophic cascades in macroecological systems, yet their relevance in microbially dominated soil ecosystems remains underexplored. We combined a regional field survey with controlled experiments using a defined 122-strain synthetic bacterial community and bacterivorous nematodes to test whether faunal predation reorganizes root-associated microbiomes to suppress soilborne disease. Field observations showed that sites with stronger nematode-Pseudomonadota associations had lower bacterial wilt incidence. In controlled experiments, nematode predation selectively enriched Pseudomonadota in the rhizosphere and reduced Ralstonia solanacearum populations and disease incidence. Preferential grazing drove this enrichment: Pseudomonadota constitu

SUBMITTER: Chuai H 

PROVIDER: S-EPMC12904284 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature