The PavDREB1E-PavD8-PavHY5 module integrates light and gibberellin signals to regulate sweet cherry anthocyanin biosynthesis.

ABSTRACT: Light stimulates anthocyanin accumulation in bicolored sweet cherry (Prunus avium cv. Rainier) fruits, resulting in red pigmentation. The phytohormone gibberellin (GA) plays an important role in fruit coloration, but the molecular mechanisms that integrate light and GA signaling pathways during anthocyanin biosynthesis remain poorly understood. We show that light induces anthocyanin accumulation but reduces the gibberellic acid (GA3) content in "Rainier" sweet cherry fruits and that GA3 treatment inhibits light-induced anthocyanin accumulation. Light exposure and low GA3 levels induce the transcription of a DEHYDRATION RESPONSIVE ELEMENT-BINDING PROTEIN (DREB) gene, PavDREB1E, which encodes a protein that directly activates the transcription of key anthocyanin biosynthesis genes, including

SUBMITTER: Xiao Y 

PROVIDER: S-EPMC12700780 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature