脱落酸依赖的与非依赖的信号途径的研究进展

Advances in the Study of Abscisic Acid-Dependent and non-Dependent Signaling Pathways

植物生长调节激素脱落酸既能调控植物的多种生理反应,如种子萌发、气孔关闭等,还能够调控许多胁迫应答基因的表达。当植物处于逆境胁迫如渗透胁迫下时会引起ABA的积累,后者通过整合多种胁迫信号,调控下游相关基因的表达来响应胁迫。转录因子ABRE/ABF通过不同的ABREs激活主要的ABA依赖性应激反应,而DREB蛋白则通过DREs以ABA非依赖性方式激活应激反应;两种信号转导途径之间存在相互作用,在渗透胁迫下的ABA信号转导途径中,DREB2A受AREB1/ABF2、AREB2/ABF4和ABF3的调控。本研究总结近年来脱落酸两种信号转导途径的最新研究进展,旨在为植物抗逆机制研究提供科学依据。

Plant growth regulating hormone abscission acid can not only regulate a variety of physiological responses of plants,such as seed germination,stomatal closure,but also can regulate the expression of many stress response genes.When plants are under stress,such as osmotic stress,ABA accumulation will be caused,and the latter responds to stress by integrating multiple stress signals and regulating the expression of downstream related genes.Transcription factor ABRE/ABF activates the major ABA-dependent stress response through different ABREs,while DREB protein activates the stress response through DREs in a ABA non-dependent manner.There is interaction between the two signal transduction pathways.In the ABA signal transduction pathway under osmotic stress,DREB2 A is regulated by AREB1/ABF2,AREB2/ABF4 and ABF3.In order to provide scientific basis for the research on the mechanism of plant stress tolerance,this paper summarized the latest research progress of two signal transduction pathways of abscisic acid in recent years.