title: MAP kinases, MPK9 and MPK12, regulate chitosan-induced stomatal closure.
abstract: Chitosan (CHT)-induced stomatal closure was inhibited by an MAPKK inhibitor, PD98059, and was impaired in mpk9 mpk12 but not in mpk9 or mpk12. CHT induced the production of reactive oxygen species, cytosolic alkalization, and cytosolic Ca(2+) oscillation in mpk9 mpk12. These results suggest that MPK9 and MPK12 are involved in CHT-induced stomatal closure.
authors.affiliation: Graduate School of Natural Science and Technology, Okayama University, 1-1-1 Tsushima-naka, Okayama 700-8530, Japan.
authors.forename: Mohammad Abdus
authors.initials: MA
authors.lastname: Salam
authors.forename: Fabien
authors.initials: F
authors.lastname: Jammes
authors.forename: Mohammad Anowar
authors.initials: MA
authors.lastname: Hossain
authors.forename: Wenxiu
authors.initials: W
authors.lastname: Ye
authors.forename: Yoshimasa
authors.initials: Y
authors.lastname: Nakamura
authors.forename: Izumi C
authors.initials: IC
authors.lastname: Mori
authors.forename: June M
authors.initials: JM
authors.lastname: Kwak
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Murata
mesh_terms: D017360:Arabidopsis / Q000187:drug effects* / Q000201:enzymology; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism*; D002118:Calcium / Q000378:metabolism; D048271:Chitosan / Q000494:pharmacology*; D003600:Cytosol / Q000187:drug effects / Q000378:metabolism; D005452:Fluoresceins; D005456:Fluorescent Dyes; D006863:Hydrogen-Ion Concentration; D048291:Mitogen-Activated Protein Kinase 12 / Q000235:genetics / Q000378:metabolism*; D048056:Mitogen-Activated Protein Kinase 9 / Q000235:genetics / Q000378:metabolism*; D009154:Mutation; D054046:Plant Stomata / Q000187:drug effects* / Q000201:enzymology; D017382:Reactive Oxygen Species / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects / Q000235:genetics
chemical_list: D029681:Arabidopsis Proteins; D005452:Fluoresceins; D005456:Fluorescent Dyes; D017382:Reactive Oxygen Species; C057433:2',7'-bis-(2-carboxyethyl)-5(6)-carboxyfluorescein acetoxymethyl ester; D048271:Chitosan; D048291:Mitogen-Activated Protein Kinase 12; D048056:Mitogen-Activated Protein Kinase 9; D002118:Calcium