Deficient glutathione in guard cells facilitates abscisic acid-induced stomatal closure but does not affect light-induced stomatal opening |
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| Authors: | Jahan Md Sarwar Ogawa Ken'ichi Nakamura Yoshimasa Shimoishi Yasuaki Mori Izumi C Murata Yoshiyuki |
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| Institution: | Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan. |
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| Abstract: | We investigated the role of glutathione (GSH) in stomatal movements using a GSH deficient mutant, chlorinal-1 (ch1-1). Guard cells of ch1-1 mutants accumulated less GSH than wild types did. Light induced stomatal opening in ch1-1 and wild-type plants. Abscisic acid (ABA) induced stomatal closure in ch1-1 mutants more than wild types without enhanced reactive oxygen species (ROS) production. Therefore, GSH functioned downstream of ROS production in the ABA signaling cascade. |
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