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The Roles of CATALASE2 in Abscisic Acid Signaling in Arabidopsis Guard Cells |
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| Abstract: | We investigated the roles of catalase (CAT) in abscisic acid (ABA)-induced stomatal closure using a cat2 mutant and an inhibitor of CAT, 3-aminotriazole (AT). Constitutive reactive oxygen species (ROS) accumulation due to the CAT2 mutation and AT treatment did not affect stomatal aperture in the absence of ABA, whereas ABA-induced stomatal closure, ROS production, and Ca2+]cyt oscillation were enhanced. |
| Keywords: | abscisic acid catalase guard cells hydrogen peroxide [Ca2+]cyt oscillation |