GW2 Interacts With OsPIP2;1 to Control Cell Division and Expansion in Rice

Summary statement This study demonstrates that GW2 overexpression causes non‐lethal pleiotropic defects and identifies aquaporin OsPIP2;1 as its potential target. GW2 interacts with OsPIP2;1 and establishes a novel regulatory module controlling grain size through modulation of water transport and photosynthetic efficiency.