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

doi:10.1271/bbb.120228

This article has now been updated. Please use the final version.

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

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Keywords: chitosan, cytosolic alkalization, cytosolic Ca²⁺, reactive oxygen species, stomatal closure

JOURNAL FREE ACCESS Advance online publication

Article ID: 120228

DOI https://doi.org/10.1271/bbb.120228

The final version of this article is now available: Vol. 76 (2012) , No. 9 p.1785

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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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