参与气孔脱落酸信号转导的离子通道与转运蛋白研究进展

Advances in studies of ion channels and transporters involved in stomatal ABA signaling

干旱胁迫条件下,脱落酸会诱导植物气孔的快速关闭。定位在保卫细胞质膜与液泡膜上的特定离子通道和转运蛋白是脱落酸信号转导途径下游的关键效应分子,其活性变化参与对气孔开度的渗透调节。本文梳理了参与气孔脱落酸信号转导的主要离子通道和转运蛋白,探讨了这些跨膜孔道蛋白的分子表征及活性调控模式,并对其作为遗传靶标在改良作物水分利用效率层面的潜力进行了展望。

The phytohormone abscisic acid(ABA)triggers rapid stomatal closure in response to drought stress.A plethora of plasma membrane-and tonoplast-localized ion channels and transporters have been characterized as key downstream effectors of the ABA signaling cascade in guard cells.This paper provides an overview of the predominant ion channels and transporters involved in stomatal responses to ABA,with a focus on their molecular patterns and underlying regulatory mechanisms.This review also discusses the potential of genetic engineering of these molecules for improving crop water-use efficiency.