逆境条件下植物CBL-CIPK信号途径转导的分子机制

The Mechanism of CBL-CIPK Signal Transduction under Stresses in Plants

非生物逆境条件下,植物细胞中的钙离子浓度会发生变化从而导致独特的钙信号的产生,钙信号通过与各种钙离子结合蛋白作用,从而将信号继续向下游传递。CBL蛋白作为近年来刚发现的一类钙结合元件,通过与一类丝氨酸/苏氨酸蛋白激酶-CIPK相互作用而形成了一套植物钙信号传递网络,并且在盐、干旱、低钾等非生物逆境的信号传递中起着重要作用。

In plant, intracellular calcium levels altered in response to multiple abiotic stresses result in calcium signatures. Although the specific signature of the calcium transients can encode information on its own, an additional level of regulation in calcium signaling is achieved via the action of calcium-binding proteins. Calcineurin B-like proteins, as the plant calcium-binding proteins recently identified, must function by binding and regulating a group of serine-threonine protein kinases called CIPKs （CBL-interacting protein kinases） and provide a signal network to adapt various stresses. The calcium signal pathways have been well studied in plant and it has been identified that the pathways play important roles in multiple abiotic stresses, including salt, drought and low K^＋.