Department of Plant Science, 222 Agriculture Building, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.
Genes (Basel). 2021 Oct 14;12(10):1620. doi: 10.3390/genes12101620.
Plant growth and development and interactions with the environment are regulated by phytohormones and other signaling molecules. During their evolution, plants have developed strategies for efficient signal perception and for the activation of signal transduction cascades to maintain proper growth and development, in particular under adverse environmental conditions. Abscisic acid (ABA) is one of the phytohormones known to regulate plant developmental events and tolerance to environmental stresses. The role of ABA is mediated by both its accumulated level, which is regulated by its biosynthesis and catabolism, and signaling, all of which are influenced by complex regulatory mechanisms. Under stress conditions, plants employ enzymatic and non-enzymatic antioxidant strategies to scavenge excess reactive oxygen species (ROS) and mitigate the negative effects of oxidative stress. Glutathione (GSH) is one of the main antioxidant molecules playing a critical role in plant survival under stress conditions through the detoxification of excess ROS, maintaining cellular redox homeostasis and regulating protein functions. GSH has recently emerged as an important signaling molecule regulating ABA signal transduction and associated developmental events, and response to stressors. This review highlights the current knowledge on the interplay between ABA and GSH in regulating seed dormancy, germination, stomatal closure and tolerance to drought.
植物的生长发育以及与环境的相互作用受到植物激素和其他信号分子的调控。在进化过程中，植物已经发展出了高效的信号感知策略，以及激活信号转导级联的策略，以维持适当的生长和发育，特别是在不利的环境条件下。脱落酸（ABA）是一种已知的植物激素，它可以调节植物发育事件和对环境胁迫的耐受性。ABA 的作用是通过其积累水平介导的，其积累水平受其生物合成和分解代谢的调节，以及信号转导的调节，所有这些都受到复杂的调节机制的影响。在胁迫条件下，植物采用酶促和非酶促抗氧化策略来清除过量的活性氧（ROS），减轻氧化应激的负面影响。谷胱甘肽（GSH）是主要的抗氧化分子之一，通过解毒过量的 ROS、维持细胞氧化还原稳态和调节蛋白质功能，在植物应对胁迫条件下的生存中发挥着关键作用。GSH 最近已成为一种重要的信号分子，调节 ABA 信号转导和相关的发育事件以及对胁迫的反应。本文综述了 ABA 和 GSH 之间在调节种子休眠、萌发、气孔关闭和耐旱性方面相互作用的最新知识。
