MAP kinases, MPK9 and MPK12, regulate chitosan-induced stomatal closure.

Mohammad Abdus Salam, Fabien Jammes, Mohammad Anowar Hossain, Wenxiu Ye, Yoshimasa Nakamura, Izumi C Mori, June M Kwak, Yoshiyuki Murata

Graduate School of Natural Science and Technology, Okayama University, 1-1-1 Tsushima-naka, Okayama 700-8530, Japan.

Bioscience, biotechnology, and biochemistry 2012

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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.

Citation

Mohammad Abdus Salam, Fabien Jammes, Mohammad Anowar Hossain, Wenxiu Ye, Yoshimasa Nakamura, Izumi C Mori, June M Kwak, Yoshiyuki Murata. MAP kinases, MPK9 and MPK12, regulate chitosan-induced stomatal closure. Bioscience, biotechnology, and biochemistry. 2012;76(9):1785-7