脱落酸(ABA)受体的研究进展

THE PROGRESSES OF STUDIES ON ABSCISIC ACID RECEPTORS

植物激素脱落酸（ＡＢＡ）在植物对逆境适应及种子发育过程中具有重要的生理功能。尽管ＡＢＡ作用的分子机制还不清楚，ＡＢＡ受体还未得到鉴定，但近年来对ＡＢＡ结合蛋白的研究取得了可喜的进展，已在多种植物中证明存在与ＡＢＡ有高亲和力的结合蛋白。ＡＢＡ的识别到底发生在胞外还是胞内，近几年随着微注射技术的应用，也得到不少实验证据。ＡＢＡ信号的转导途径，特别是位于下游区域参与信号传递的物质的研究取得重大进展，其中以ＡＢＡ调节气孔保卫细胞开关的信号传递成为研究这一领域的模式体系。

Abscisic acid (ABA) participates in the control of diverse physioogical process. Although the molecular mechanism of ABA action is unknown, ABA receptor(s) have not yet been identified, high affinity of ABA binding proteins in some plants, either membranebound or soluble, have been described. The sense of ABA lies in the outside or inside of plasma membrane, there are some evidences with the techniques of microinjection. Considerable progress has been recently made in the characterization of more downstream elements of the ABA regulatory network, especially in the control of stomatal aperture by ABA. The details of the underlying signalling pathways start to emerge.