BIL7 enhances plant growth by regulating the transcription factor BIL1/BZR1 during brassinosteroid signaling.

ABSTRACT: Brassinosteroids (BRs) are plant steroid hormones that regulate plant development and environmental responses. BIL1/BZR1, a master transcription factor that regulates approximately 3000 genes in the BR signaling pathway, is transported to the nucleus from the cytosol in response to BR signaling; however, the molecular mechanism underlying this process is unknown. Here, we identify a novel BR signaling factor, BIL7, that enhances plant growth and positively regulates the nuclear accumulation of BIL1/BZR1 in Arabidopsis thaliana. BIL7-overexpressing plants were resistant to the BR biosynthesis inhibitor Brz and taller than wild-type (WT) plants were due to increased cell division. BIL7 is mainly localized to the plasma membrane, but during the early stages of cell growth, it was also localiz

SUBMITTER: Miyaji T 

PROVIDER: S-EPMC11771540 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature