Response and degradation of indole-3-aceticacid by the plant growth-promoting rhizobacteria Variovorax boronicumulans.

ABSTRACT: Plant growth-promoting rhizobacteria (PGPR) of the genus Variovorax facilitate plant growth through beneficial microbe-plant interplay. Unlike most PGPRs, Variovorax boronicumulans CGMCC 4969 utilizes indole-3-acetonitrile as a precursor to generate indole-3-acetic acid (IAA), which is subsequently metabolized by itself. In this study, IAA enhanced the growth of V. boronicumulans CGMCC 4969 in minimal salt medium (MSM), whereas it inhibited bacterial growth when glucose was added to the MSM broth. IAA was rapidly degraded within 12 h in MSM broth despite glucose appeared or not. Notably, in LB broth, the cell growth was significantly inhibited by IAA concentration beyond 1 mmol/L, while the IAA degradation capability of CGMCC 4969 was significantly increased following exposure to IAA-dosed

SUBMITTER: Guo J 

PROVIDER: S-EPMC12852158 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature