Reactive Oxygen Species (ROS) and ABA Signalling - Abscisic Acid: Metabolism, Transport and Signaling - page 185

Chapter 10
Reactive Oxygen Species (ROS)
and ABA Signalling

Ling Bai, Pengtao Wang and Chun-Peng Song

Abstract Various abiotic and biotic stress conditions result in the accumulation of
both abscisic acid (ABA) and reactive oxygen species (ROS) in plants. The adaptation
of plants to these stress conditions is a very complex process, which including stress
signal perception, transduction and change of genes expression. The signalling path-
ways between ABA and ROS are independent of each other or crosstalk at various lev-
els. The first part of this chapter focus on ROS turnover in the presence of ABA and
under stress conditions, including their generation from photosynthetic system and non-
photosynthetic system, the ROS detoxification by enzymatic antioxidant systems and
non-enzymatic low-molecular weight metabolites. The second part is attempted to
explore the dual role of ROS for toxic to cells and signalling in stress adaptation regu-
lated by ABA. Finally, the third part in detail discusses the crosstalk between ABA and
ROS in regulation of stomatal movement, dormancy and germination of seed, develop-
ment of root system and stress adaptation in the transcription levels.

Keywords Reactive oxygen species · ABA signalling · Biological roles · Crosstalk

Abbreviations

ROS Reactive oxygen species

ABI1 ABA insensitive 1

ABI2 ABA insensitive 2

AtGPX3 Arabidopsis glutathione peroxidase 3

OST1 Open stomata 1

MPK Mitogen-activated protein kinase

MEKK Mitogen-activated protein kinase kinase