Roles of RCN1, Regulatory A Subunit of Protein Phosphatase 2A, in Methyl Jasmonate Signaling and Signal Crosstalk between Methyl Jasmonate and Abscisic Acid | Zendy

Naoki Saito | Zendy; Shintaro Munemasa | Zendy; Yoshimasa Nakamura | Zendy; Yasuaki Shimoishi | Zendy; Izumi C. Mori | Zendy; Yoshiyuki Murata | Zendy

Open Access

Roles of RCN1, Regulatory A Subunit of Protein Phosphatase 2A, in Methyl Jasmonate Signaling and Signal Crosstalk between Methyl Jasmonate and Abscisic Acid

Author(s) -

Naoki Saito,

Shintaro Munemasa,

Yoshimasa Nakamura,

Yasuaki Shimoishi,

Izumi C. Mori,

Yoshiyuki Murata

Publication year - 2008

Publication title -

plant and cell physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.975

H-Index - 152

eISSN - 1471-9053

pISSN - 0032-0781

DOI - 10.1093/pcp/pcn106

Subject(s) - methyl jasmonate , abscisic acid , guard cell , arabidopsis , crosstalk , mutant , microbiology and biotechnology , chemistry , wild type , jasmonate , biochemistry , signal transduction , biology , physics , gene , optics

Methyl jasmonate (MeJA) as well as abscisic acid (ABA) induces stomatal closure with their signal crosstalk. We investigated the function of a regulatory A subunit of protein phosphatase 2A, RCN1, in MeJA signaling. Both MeJA and ABA failed to induce stomatal closure in Arabidopsis rcn1 knockout mutants unlike in wild-type plants. Neither MeJA nor ABA induced reactive oxygen species (ROS) production and suppressed inward-rectifying potassium channel activities in rcn1 mutants but not in wild-type plants. These results suggest that RCN1 functions upstream of ROS production and downstream of the branch point of MeJA signaling and ABA signaling in Arabidopsis guard cells.

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