Sugar inhibits brassinosteroid signaling by enhancing BIN2 phosphorylation of BZR1.

ABSTRACT: Sugar, light, and hormones are major signals regulating plant growth and development, however, the interactions among these signals are not fully understood at the molecular level. Recent studies showed that sugar promotes hypocotyl elongation by activating the brassinosteroid (BR) signaling pathway after shifting Arabidopsis seedlings from light to extended darkness. Here, we show that sugar inhibits BR signaling in Arabidopsis seedlings grown under light. BR induction of hypocotyl elongation in seedlings grown under light is inhibited by increasing concentration of sucrose. The sugar inhibition of BR response is correlated with decreased effect of BR on the dephosphorylation of BZR1, the master transcription factor of the BR signaling pathway. This sugar effect is independent of the suga

SUBMITTER: Zhang Z 

PROVIDER: S-EPMC8153450 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature