Function of ABA in Stomatal Defense against Biotic and Drought Stresses.
Function of ABA in Stomatal Defense against Biotic and Drought Stresses.
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DOI：
10.3390/ijms160715251
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发表时间：
2015-07-06
影响因子：
5.6
通讯作者：
Lee SC
中科院分区：
文献类型：
--
作者：
Lim CW;Baek W;Jung J;Kim JH;Lee SC
植物激素脱落酸（阿坝）调节植物发育和适应生物和非生物胁迫的许多关键过程。在胁迫条件下，植物在各种器官中合成阿坝并启动防御机制，例如调节气孔开度和表达赋予对环境胁迫的抗性的防御相关基因。气孔开闭的调节对植物防御病原菌和控制蒸腾失水具有重要意义。最近的研究使用相结合的方法，包括遗传学，生理学和分子生物学，有相当大的贡献，我们的阿坝信号转导的理解。许多与阿坝信号和反应相关的蛋白质，特别是阿坝受体，已经被鉴定出来。阿坝信号转导通过阿坝受体启动信号感知，并通过下游蛋白质，包括蛋白激酶和磷酸酶传递。本文通过分析阿坝信号的各个组成部分及其在复杂的相互作用网络中的相互关系，重点阐述了阿坝在植物气孔防御生物和非生物胁迫中的作用。特别是，提出了两个阿坝信号通路模型响应生物和非生物胁迫，从胁迫信号到气孔关闭，涉及吡拉菌素抗性（PYR）/PYR样（PYL）或阿坝受体的调节成分（RCAR）家族蛋白，2C-型蛋白磷酸酶，SnRK 2-型蛋白激酶。
The plant hormone abscisic acid (ABA) regulates many key processes involved in plant development and adaptation to biotic and abiotic stresses. Under stress conditions, plants synthesize ABA in various organs and initiate defense mechanisms, such as the regulation of stomatal aperture and expression of defense-related genes conferring resistance to environmental stresses. The regulation of stomatal opening and closure is important to pathogen defense and control of transpirational water loss. Recent studies using a combination of approaches, including genetics, physiology, and molecular biology, have contributed considerably to our understanding of ABA signal transduction. A number of proteins associated with ABA signaling and responses—especially ABA receptors—have been identified. ABA signal transduction initiates signal perception by ABA receptors and transfer via downstream proteins, including protein kinases and phosphatases. In the present review, we focus on the function of ABA in stomatal defense against biotic and abiotic stresses, through analysis of each ABA signal component and the relationships of these components in the complex network of interactions. In particular, two ABA signal pathway models in response to biotic and abiotic stress were proposed, from stress signaling to stomatal closure, involving the pyrabactin resistance (PYR)/PYR-like (PYL) or regulatory component of ABA receptor (RCAR) family proteins, 2C-type protein phosphatases, and SnRK2-type protein kinases.