Behind the scenes: the roles of reactive oxygen species in guard cells

2013 ◽  
Vol 201 (4) ◽  
pp. 1121-1140 ◽  
Author(s):  
Yuwei Song ◽  
Yuchen Miao ◽  
Chun-Peng Song
Keyword(s):  
Reactive Oxygen Species ◽  
Reactive Oxygen ◽  
Guard Cells ◽  
Oxygen Species

scholarly journals Regulation of reactive oxygen species-mediated abscisic acid signaling in guard cells and drought tolerance by glutathione

2013 ◽  
Vol 4 ◽  
Author(s):  
Shintaro Munemasa ◽  
Daichi Muroyama ◽  
Hiroki Nagahashi ◽  
Yoshimasa Nakamura ◽  
Izumi C. Mori ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Abscisic Acid ◽  
Drought Tolerance ◽  
Reactive Oxygen ◽  
Guard Cells ◽  
Oxygen Species ◽  
Abscisic Acid Signaling

scholarly journals Autophagy controls reactive oxygen species homeostasis in guard cells that is essential for stomatal opening

2019 ◽  
Vol 116 (38) ◽  
pp. 19187-19192 ◽  
Author(s):  
Shota Yamauchi ◽  
Shoji Mano ◽  
Kazusato Oikawa ◽  
Kazumi Hikino ◽  
Kosuke M. Teshima ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Stomatal Closure ◽  
Reactive Oxygen ◽  
Guard Cells ◽  
Stomatal Opening ◽  
Glycolate Oxidase ◽  
Oxygen Species ◽  
Ros Accumulation ◽  
Intracellular Ros ◽  
Ros Scavenger

Reactive oxygen species (ROS) function as key signaling molecules to inhibit stomatal opening and promote stomatal closure in response to diverse environmental stresses. However, how guard cells maintain basal intracellular ROS levels is not yet known. This study aimed to determine the role of autophagy in the maintenance of basal ROS levels in guard cells. We isolated the Arabidopsis autophagy-related 2 (atg2) mutant, which is impaired in stomatal opening in response to light and low CO2 concentrations. Disruption of other autophagy genes, including ATG5, ATG7, ATG10, and ATG12, also caused similar stomatal defects. The atg mutants constitutively accumulated high levels of ROS in guard cells, and antioxidants such as ascorbate and glutathione rescued ROS accumulation and stomatal opening. Furthermore, the atg mutations increased the number and aggregation of peroxisomes in guard cells, and these peroxisomes exhibited reduced activity of the ROS scavenger catalase and elevated hydrogen peroxide (H2O2) as visualized using the peroxisome-targeted H2O2 sensor HyPer. Moreover, such ROS accumulation decreased by the application of 2-hydroxy-3-butynoate, an inhibitor of peroxisomal H2O2-producing glycolate oxidase. Our results showed that autophagy controls guard cell ROS homeostasis by eliminating oxidized peroxisomes, thereby allowing stomatal opening.

scholarly journals A Role for Phosphatidylinositol 3-Phosphate in Abscisic Acid-Induced Reactive Oxygen Species Generation in Guard Cells

2003 ◽  
Vol 132 (1) ◽  
pp. 92-98 ◽  
Author(s):  
Ki-Youb Park ◽  
Ji-Yul Jung ◽  
Jumok Park ◽  
Jae-Ung Hwang ◽  
Yong-Woo Kim ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Abscisic Acid ◽  
Reactive Oxygen Species Generation ◽  
Reactive Oxygen ◽  
Guard Cells ◽  
Oxygen Species ◽  
Phosphatidylinositol 3
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