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Open Access Highly Accessed Review

ABA signal in rice under stress conditions

Nenghui Ye1, Liguo Jia1 and Jianhua Zhang12*

Author Affiliations

1 Department of Biology, Hong Kong Baptist University, Hong Kong, China

2 School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong, China

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Rice 2012, 5:1  doi:10.1186/1939-8433-5-1

Published: 27 February 2012

Abstract

Ever since its discovery, abscisic acid (ABA) has been intensively studied due to its versatile functions in plant developmental and physiological processes. Many signaling details of ABA have been well elucidated and reviewed. The identification of ABA receptors is a great breakthrough in the field of ABA study, whereas the discovery of ABA transporter has changed our concept that ABA is delivered solely by passive transport. The intensity of ABA signaling pathway is well known to be controlled by multi-regulators. Nonetheless, the interaction and coordination among ABA biosynthesis, catabolism, conjugation and transportation are seldom discussed. Here, we summarize the biological functions of ABA in response to different stresses, especially the roles of ABA in plant defense to pathogen attack, and discuss the possible relationships of these determinants in controlling the specificity and intensity of ABA signaling pathway in the rice.

Keywords:
abscisic acid (ABA); ABA transporter; ABA receptor; ABA signaling; ABA metabolism; ABA biosynthesis; abiotic and biotic stresses; rice (Oryza sativa)