Calcium (Ca2+) sensors and MYC2 are crucial players during jasmonates‐mediated abiotic stress tolerance in plants

Abstract

AbstractPlants evolve stress‐specific responses that sense changes in their external environmental conditions and develop various mechanisms for acclimatization and survival. Calcium (Ca2+) is an essential stress‐sensing secondary messenger in plants. Ca2+ sensors, including calcium‐dependent protein kinases (CDPKs), calmodulins (CaMs), CaM‐like proteins (CMLs), and calcineurin B‐like proteins (CBLs), are involved in jasmonates (JAs) signalling and biosynthesis. Moreover, JAs are phospholipid‐derived phytohormones that control plant response to abiotic stresses. The JAs signalling pathway affects hormone–receptor gene transcription by binding to the basic helix–loop–helix (bHLH) transcription factor. MYC2 acts as a master regulator of JAs signalling module assimilated through various genes. The Ca2+ sensor CML regulates MYC2 and is involved in a distinct mechanism mediating JAs signalling during abiotic stresses. This review highlights the pivotal role of the Ca2+ sensors in JAs biosynthesis and MYC2‐mediated JAs signalling during abiotic stresses in plants.