MicroProtein OsPAR1 regulates grain size through OsBCL1-mediated cell expansion control in rice.

Abstract excerpt

Grain size is a crucial agronomic trait that influences the grain weight and yield of rice (Oryza sativa L.). Here, we identified and characterized OsPAR1, an HLH-type miP (microProtein), as a positive regulator of grain size and grain weight. Loss-of-function Ospar1 mutants exhibited reduced cell size of the rice spikelet hulls, resulting in significantly smaller grains and lower grain weight. Conversely,...

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