Chinese Bulletin of Botany ›› 2014, Vol. 49 ›› Issue (4): 490-503.DOI: 10.3724/SP.J.1259.2014.00490

Previous Articles     Next Articles

Reactive Oxygen Species Signaling in Stomata

Pengtao Wang*, Jing Zhao, Huanhuan Yu   

  1. Henan Key Laboratory of Plant Stress Biology; State Key Laboratory of Cotton Biology; College of Life Sciences, Henan University, Kaifeng 475004, China
  • Received:2013-05-13 Revised:2013-07-04 Online:2014-07-01 Published:2014-08-08
  • Contact: Pengtao Wang

Abstract: Reactive oxygen species (ROS) act as signaling molecules in stomata guard cells. ROS generation occurs in guard cells via specific enzymes. The most-studied enzymatic source is the NADPH oxidase component RBOH, which is involved in both abiotic and biotic stresses. Hormones, such as abscisic acid, salicylic acid, ethylene, auxin, and cytokinin, affect ROS-mediated responses in stomata. Biotic stresses, such as virulent bacteria and fungi, also affect stomata movements, where ROS likely play a role. Regulation of ROS production and action occurs at various levels, including antioxidant activities as well as ROS-sensitive proteins, such as kinases and phosphatases, which transduce ROS to affect stomatal closure. Evidence is gradually emerging of the ROS regulation of ion channels in stomata. Guard cells are an attractive model to study ROS signal transduction because of a complex integration of signaling pathways mediated via ROS.