期刊
PLANT AND CELL PHYSIOLOGY
卷 49, 期 9, 页码 1396-1401出版社
OXFORD UNIV PRESS
DOI: 10.1093/pcp/pcn106
关键词
abscisic acid; Arabidopsis thaliana; guard cells; K+ channel; methyl jasmonate; reactive oxygen species
资金
- The Asahi Glass Foundation
- NOVARTIS Foundation (Japan) for the Promotion of Science
- Ministry of Education, Culture, Sports, Science and Technology of Japan
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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