Mitogen-Activated Protein Kinases 3/6 Reduce Auxin Signaling via Stabilizing Indoleacetic Acid-Induced Proteins 8/9 in Plant Abiotic Stress Adaptation.

ABSTRACT: The balance between plant growth and stress response is a key issue in the field of biology. In this process, mitogen-activated protein kinase 3 (MPK3) and MPK6 contribute to the construction of plants' defense system during stress tolerance, while auxin, a growth-promoting hormone, is the key to maintaining plant growth. Nevertheless, the antagonistic or cooperative relationship between MPK3/6-mediated stress response and auxin-mediated plant growth remains unclear. Here, we demonstrate that stress-activated MPK3/6 interact with the auxin signaling repressors indoleacetic acid-induced protein 8 (IAA8) and IAA9, two key targets for regulating the auxin signaling output during stress responses. Protein phosphorylation mass spectrometry followed by a co-analysis with in vitro phosphorylation

SUBMITTER: Wang C 

PROVIDER: S-EPMC11900227 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature