OsWRKY78 regulates panicle exsertion via gibberellin signaling pathway in rice

• DOI: 10.1111/jipb.13636
• Publication Date: 2024-03-12T10:54:16Z
• Authors: Enyang Mei; Mingliang He; Min Xu; Jiaqi Tang; Jiali Liu; Yingxiang Liu; Zhipeng Hong; Xiufeng Li; Zhenyu Wang; Qingjie Guan; Xiaojie Tian; Qingyun Bu
• Keywords: Panicle; Crosstalk

ABSTRACT Panicle exsertion is one of the crucial agronomic traits in rice ( Oryza sativa ). Shortening panicle often leads to enclosure and severely reduces seed production. Gibberellin (GA) plays important roles regulating exsertion. However, underlying mechanism relative regulatory network remain elusive. Here, we characterized oswrky78 mutant showing severe enclosure, found that defect caused by decreased bioactive GA contents. Biochemical analysis demonstrates OsWRKY78 can directly activate biosynthesis indirectly suppress metabolism. Moreover, interact with be phosphorylated mitogen‐activated protein kinase (MAPK) OsMAPK6, this phosphorylation enhance stability necessary for its biological function. Taken together, these results not only reveal critical function OsWRKY78, but also via mediating crosstalk between MAPK signaling pathway