OsBSK3 and OsBSK2 regulate grain size and leaf angle via MAPK signaling pathway in rice.

Grain size and leaf angle are key agronomic traits that determine the final yield. OsBSKs (BRASSINOSTEROID-SIGNALING KINASES) and OsMAPKs (MITOGEN ACTIVATED PROTEIN KINASE) are known to play essential roles in plant growth, development, and stress responses. However, the potential crosstalk between these pathways and their specific roles in regulating grain size and leaf angle remain largely unexplored in rice.