Summary statement The study identifies a phosphorylation‐dependent calcium signalling module, PuCBL9–PuCIPK11, that remodels the guard‐cell actin cytoskeleton in Populus ussuriensis to accelerate stomatal closure. This work bridges a long‐standing gap between calcium decoding and cytoskeletal dynamics in trees, and opens a new translational avenue for forest improvement.
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Hasan et al. (2026) studied this question.
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