Allyl isothiocyanate (AITC) induces stomatal closure in Arabidopsis

Khokon, Md Atiqur Rahman and Jahan, Md Sarwar and Rahman, Taniya and Hossain, Mohammad Anowar and Muroyama, Daichi and Minami, Ikuko and Munemasa, Shintaro and Mori, Izumi C and Nakamura, Yoshimasa and Murata, Yoshiyuki (2011) Allyl isothiocyanate (AITC) induces stomatal closure in Arabidopsis. Plant, Cell & Environment, 34 (11). pp. 1900-6. ISSN 1365-3040

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Isothiocyanates (ITCs) are degradation products of glucosinolates in crucifer plants and have repellent effect on insects, pathogens and herbivores. In this study, we report that exogenously applied allyl isothiocyanate (AITC) induced stomatal closure in Arabidopsis via production of reactive oxygen species (ROS) and nitric oxide (NO), and elevation of cytosolic Ca(2+) . AITC-induced stomatal closures were partially inhibited by an inhibitor of NADPH oxidase and completely inhibited by glutathione monoethyl ester (GSHmee). AITC-induced stomatal closure and ROS production were examined in abscisic acid (ABA) deficient mutant aba2-2 and methyl jasmonate (MeJA)-deficient mutant aos to elucidate involvement of endogenous ABA and MeJA. Genetic evidences have demonstrated that AITC-induced stomatal closure required MeJA priming but not ABA priming. These results raise the possibility that crucifer plants produce ITCs to induce stomatal closure, leading to suppression of water loss and invasion of fungi through stomata.

Item Type: Article
Subjects: S Agriculture > S Agriculture (General)
Faculty / Institute: Faculty of Bioresources & Food Industry
Depositing User: Dr. Md Sarwar Jahan
Date Deposited: 21 Jan 2015 08:20
Last Modified: 21 Jan 2015 08:20

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