MAP Kinases, MPK9 and MPK12, Regulate Chitosan-Induced Stomatal Closure

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  • SALAM Mohammad Abdus
    Graduate School of Natural Science and Technology, Okayama University Graduate School of Natural Science and Technology, Okayama University
  • JAMMES Fabien
    Department of Cell Biology and Molecular Genetics, University of Maryland Department of Cell Biology and Molecular Genetics, University of Maryland
  • HOSSAIN Mohammad Anowar
    Graduate School of Natural Science and Technology, Okayama University Graduate School of Natural Science and Technology, Okayama University
  • YE Wenxiu
    Graduate School of Natural Science and Technology, Okayama University Graduate School of Natural Science and Technology, Okayama University
  • NAKAMURA Yoshimasa
    Graduate School of Natural Science and Technology, Okayama University Graduate School of Natural Science and Technology, Okayama University
  • MORI Izumi C.
    Institute of Plant Science and Resources, Okayama University Institute of Plant Science and Resources, Okayama University
  • KWAK June M.
    Department of Cell Biology and Molecular Genetics, University of Maryland Department of Plant Science and Landscape Architecture, University of Maryland Department of Plant Molecular Systems Biotechnology and Crop Biotech Institute, Kyung Hee University Department of Cell Biology and Molecular Genetics, University of Maryland Department of Plant Science and Landscape Architecture, University of Maryland Department of Plant Molecular Systems Biotechnology and Crop Biotech Institute, Kyung Hee University
  • MURATA Yoshiyuki
    Graduate School of Natural Science and Technology, Okayama University Graduate School of Natural Science and Technology, Okayama University

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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 Ca2+ oscillation in mpk9 mpk12. These results suggest that MPK9 and MPK12 are involved in CHT-induced stomatal closure.

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