保卫细胞中ABA信号调控机制研究进展

Research Progress on the Regulatory Mechanisms of ABA Signal Transduction in Guard Cells

脱落酸(ABA)具有调节植物快速响应逆境的重要功能。植物细胞中ABA核心信号通路由ABA受体PYR1/PYLs/RCARs、A类碱性蛋白磷酸酶PP2Cs和Snf1相关蛋白激酶SnRK2s组成。活性氧(ROS)和Ca^(2+)是保卫细胞中的重要第二信使,调控ABA诱导的气孔关闭。该文对保卫细胞中核心ABA信号蛋白的调控以及ROS和Ca^(2+)介导的ABA信号转导等最新研究成果进行综述,旨在阐明保卫细胞中ABA信号调控机制。

ABA plays important roles in regulating the rapid responses of plants to stresses.The ABA core signal pathway consists of ABA receptors PYR1/PYLs/RCARs,clade A protein phosphatases PP2Cs and protein kinases SnRK2s in plant cells.Reactive oxygen species(ROS)and Ca^(2+)are the vital second messengers in guard cells that involved in the stomatal closure controlled by ABA.In this review,we focus on summarizing the latest research progresses on the regulations of core ABA signaling proteins in guard cells,ROS-and Ca^(2+)-mediated guard cell ABA signal transductions,and attempt to elucidate the mechanisms of ABA signal transduction in guard cells.