3-Phenyllactic acid is converted to phenylacetic acid and induces auxin-responsive root growth in Arabidopsis plants.

ABSTRACT: Many microorganisms have been reported to produce compounds that promote plant growth and are thought to be involved in the establishment and maintenance of symbiotic relationships. 3-Phenyllactic acid (PLA) produced by lactic acid bacteria was previously shown to promote root growth in adzuki cuttings. However, the mode of action of PLA as a root-promoting substance had not been clarified. The present study therefore investigated the relationship between PLA and auxin. PLA was found to inhibit primary root elongation and to increase lateral root density in wild-type Arabidopsis, but not in an auxin signaling mutant. In addition, PLA induced IAA19 promoter fused β-glucuronidase gene expression, suggesting that PLA exhibits auxin-like activity. The inability of PLA to promote

SUBMITTER: Maki Y 

PROVIDER: S-EPMC9300423 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature