Stress-associated protein OsSAP5 regulates rice heading date through interacting with OsGF14c in rice.

ABSTRACT: Heading date, a critical agronomic trait determining rice regional adaptation and yield potential, is regulated by complex genetic networks. Although stress-associated proteins (SAPs) are well-documented mediators of abiotic stress responses, their roles in reproductive development remain poorly characterized. Here we demonstrate that stress-associated protein 5 (OsSAP5) functions as a positive regulator of heading date in rice. Loss-of-function ossap5 mutants exhibited significant heading delay under natural short day condition, accompanied by marked downregulation of florigen genes Hd3a and RFT1 and subsequent suppression of MADS-box genes in the shoot apical meristem (SAM). A similar decrease in expression of florigen genes was observed in OsGF14c overexpress

SUBMITTER: Zhu X 

PROVIDER: S-EPMC12454907 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature