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Front. Plant Sci. | doi: 10.3389/fpls.2018.00251

Antagonistic Regulation of ABA and GA in Metabolism and Signaling Pathways

  • 1Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden (CAS), China

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.

Keywords: gibberellic acid, Abscisic Acid, Antagonistic interaction, metabolic pathway, signaling pathway

Received: 30 Dec 2017; Accepted: 12 Feb 2018.

Edited by:

Paola Vittorioso, Sapienza Università di Roma, Italy

Reviewed by:

Kai Shu, College of Agronomy, Sichuan Agricultural University, China
Lucio Conti, Università degli Studi di Milano, Italy  

Copyright: © 2018 Liu and HOU. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Prof. Xingliang HOU, Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden (CAS), Guangzhou, 510650, China, houxl@scib.ac.cn