Plant Receptor-Like Kinase-Mediated Drought Stress Response Mechanism-From Root Sensing to Stomatal Regulation.

Receptor-like kinases (RLKs) coordinate drought responses across roots, vascular tissues, and leaves, integrating root sensing, long-distance signaling, and stomatal control.

• Why it matters: Drought affects water movement from soil to atmosphere, yet RLKs are often studied in isolated pathways rather than as system-level integrators.
• What they did: This review organizes RLK-mediated drought signaling across three spatial scales, covering root architecture and aquaporin dynamics, peptide/ROS wave transmission, and leaf stomatal regulation via ion channels and ROS-calcium signaling.
• The result: The framework links RLK signaling to whole-plant physiology and highlights unresolved issues, including how specificity arises among redundant RLKs and how hydraulic and biochemical cues are integrated.

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