The Roles of CATALASE2 in Abscisic Acid Signaling in Arabidopsis Guard Cells

Rayhanur JANNAT; Misugi URAJI; Miho MOROFUJI; Mohammad Anowar HOSSAIN; Mohammad Muzahidul ISLAM; Yoshimasa NAKAMURA; Izumi C. MORI; Yoshiyuki MURATA

doi:10.1271/bbb.110344

Biochemistry & Molecular Biology Notes

The Roles of CATALASE2 in Abscisic Acid Signaling in Arabidopsis Guard Cells

Rayhanur JANNAT, Misugi URAJI, Miho MOROFUJI, Mohammad Anowar HOSSAIN, Mohammad Muzahidul ISLAM, Yoshimasa NAKAMURA, Izumi C. MORI, Yoshiyuki MURATA

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Keywords: abscisic acid, catalase, guard cells, hydrogen peroxide, [Ca²⁺]_cyt oscillation

JOURNAL FREE ACCESS

2011 Volume 75 Issue 10 Pages 2034-2036

DOI https://doi.org/10.1271/bbb.110344

View "Advance Publication" version (October 7, 2011).

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Abstract

We investigated the roles of catalase (CAT) in abscisic acid (ABA)-induced stomatal closure using a cat2 mutant and an inhibitor of CAT, 3-aminotriazole (AT). Constitutive reactive oxygen species (ROS) accumulation due to the CAT2 mutation and AT treatment did not affect stomatal aperture in the absence of ABA, whereas ABA-induced stomatal closure, ROS production, and [Ca²⁺]_cyt oscillation were enhanced.

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