Deficient glutathione in guard cells facilitates abscisic acid-induced stomatal closure but does not affect light-induced stomatal opening.
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.
Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan.
Md Sarwar
MS
Jahan
Ken'ichi
K
Ogawa
Yoshimasa
Y
Nakamura
Yasuaki
Y
Shimoishi
Izumi C
IC
Mori
Yoshiyuki
Y
Murata
D000040:Abscisic Acid / Q000494:pharmacology*; D017360:Arabidopsis / Q000166:cytology / Q000187:drug effects* / Q000235:genetics / Q000528:radiation effects*; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism; D005978:Glutathione / Q000378:metabolism*; D008027:Light; D009154:Mutation / Q000235:genetics; D054046:Plant Stomata / Q000187:drug effects* / Q000378:metabolism / Q000528:radiation effects*; D017382:Reactive Oxygen Species / Q000378:metabolism
D029681:Arabidopsis Proteins; D017382:Reactive Oxygen Species; D000040:Abscisic Acid; D005978:Glutathione