Chitosan-Induced Stomatal Closure Accompanied by Peroxidase-Mediated Reactive Oxygen Species Production in<i>Arabidopsis</i>

  • KHOKON Md. Atiqur Rahman
    Graduate School of Natural Science and Technology, Division of Bioscience, Okayama University
  • URAJI Misugi
    Graduate School of Natural Science and Technology, Division of Bioscience, Okayama University
  • MUNEMASA Shintaro
    Graduate School of Natural Science and Technology, Division of Bioscience, Okayama University
  • OKUMA Eiji
    Graduate School of Natural Science and Technology, Division of Bioscience, Okayama University
  • NAKAMURA Yoshimasa
    Graduate School of Natural Science and Technology, Division of Bioscience, Okayama University
  • MORI Izumi C.
    Institute of Plant Science and Resources, Okayama University
  • MURATA Yoshiyuki
    Graduate School of Natural Science and Technology, Division of Bioscience, Okayama University

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  • Chitosan-Induced Stomatal Closure Accompanied by Peroxidase-Mediated Reactive Oxygen Species Production in Arabidopsis

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Chitosan induced stomatal closure in wild type-plants and NADPH oxidase knock-out mutants (atrbohD atrbohF), and reactive oxygen species (ROS) production in wild-type guard cells. Closure and production were completely abolished by catalase and a peroxidase inhibitor. These results indicate that chitosan induces ROS production mediated by peroxidase, resulting in stomatal closure.

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