Liu Xu, Hou Xingliang
Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.
Front Plant Sci. 2018 Feb 26;9:251. doi: 10.3389/fpls.2018.00251. eCollection 2018.
The phytohormones gibberellic acid (GA) and abscisic acid (ABA) are widely recognized as essential endogenous regulators that mostly play antagonistic roles in plant developmental processes and environmental responses. A variety of both internal and external cues oppositely regulate GA and ABA biosynthesis and catabolism, which directly and indirectly affect their signaling pathways and subsequent responses. Recent discoveries have revealed direct molecular links between GA- and ABA-signaling components, which provide novel insights into their antagonistic regulation. In this review, we mainly focus on these recent reports and the growing understanding of GA and ABA antagonism in metabolic regulation and signaling interactions, and attempt to clarify the problems and challenges involved in exploring the complicated regulatory events associated with these two phytohormones.
植物激素赤霉素（GA）和脱落酸（ABA）被广泛认为是重要的内源性调节因子，它们在植物发育过程和环境响应中大多发挥拮抗作用。多种内部和外部信号以相反的方式调节GA和ABA的生物合成及分解代谢，这直接或间接地影响它们的信号通路及后续响应。最近的发现揭示了GA和ABA信号成分之间的直接分子联系，这为它们的拮抗调节提供了新的见解。在本综述中，我们主要关注这些最新报道以及对GA和ABA在代谢调节和信号相互作用中的拮抗作用的日益深入的理解，并试图阐明在探索与这两种植物激素相关的复杂调节事件中所涉及的问题和挑战。
