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Sugiyama Y, Uraji M, Watanabe-Sugimoto M, Okuma E, Munemasa S, Shimoishi Y, Nakamura Y, Mori IC, Iwai S, Murata Y. FIA functions as an early signal component of abscisic acid signal cascade in Vicia faba guard cells. JOURNAL OF EXPERIMENTAL BOTANY 2012; 63:1357-65. [PMID: 22131163 PMCID: PMC3276098 DOI: 10.1093/jxb/err369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Revised: 09/12/2011] [Accepted: 10/21/2011] [Indexed: 05/04/2023]
Abstract
An abscisic acid (ABA)-insensitive Vicia faba mutant, fia (fava bean impaired in ABA-induced stomatal closure) had previously been isolated. In this study, it was investigated how FIA functions in ABA signalling in guard cells of Vicia faba. Unlike ABA, methyl jasmonate (MeJA), H(2)O(2), and nitric oxide (NO) induced stomatal closure in the fia mutant. ABA did not induce production of either reactive oxygen species or NO in the mutant. Moreover, ABA did not suppress inward-rectifying K(+) (K(in)) currents or activate ABA-activated protein kinase (AAPK) in mutant guard cells. These results suggest that FIA functions as an early signal component upstream of AAPK activation in ABA signalling but does not function in MeJA signalling in guard cells of Vicia faba.
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Affiliation(s)
- Yusuke Sugiyama
- Graduate School of Natural Science and Technology, Division of Bioscience, Faculty of Agriculture, Okayama University, Okayama, 700-8530, Japan
| | - Misugi Uraji
- Graduate School of Natural Science and Technology, Division of Bioscience, Faculty of Agriculture, Okayama University, Okayama, 700-8530, Japan
| | - Megumi Watanabe-Sugimoto
- Graduate School of Natural Science and Technology, Division of Bioscience, Faculty of Agriculture, Okayama University, Okayama, 700-8530, Japan
| | - Eiji Okuma
- Graduate School of Natural Science and Technology, Division of Bioscience, Faculty of Agriculture, Okayama University, Okayama, 700-8530, Japan
| | - Shintaro Munemasa
- Graduate School of Natural Science and Technology, Division of Bioscience, Faculty of Agriculture, Okayama University, Okayama, 700-8530, Japan
| | - Yasuaki Shimoishi
- Graduate School of Natural Science and Technology, Division of Bioscience, Faculty of Agriculture, Okayama University, Okayama, 700-8530, Japan
| | - Yoshimasa Nakamura
- Graduate School of Natural Science and Technology, Division of Bioscience, Faculty of Agriculture, Okayama University, Okayama, 700-8530, Japan
| | - Izumi C. Mori
- Institute of Plant Science and Resources, Okayama University, Okayama, 710-0046, Japan
| | - Sumio Iwai
- Faculty of Agriculture, Kagoshima University, Kohrimoto, Kagoshima, 890-0065, Japan
| | - Yoshiyuki Murata
- Graduate School of Natural Science and Technology, Division of Bioscience, Faculty of Agriculture, Okayama University, Okayama, 700-8530, Japan
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Mori IC, Murata Y. ABA signaling in stomatal guard cells: lessons from Commelina and Vicia. JOURNAL OF PLANT RESEARCH 2011; 124:477-87. [PMID: 21706139 DOI: 10.1007/s10265-011-0435-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Accepted: 05/10/2011] [Indexed: 05/08/2023]
Abstract
Abscisic acid (ABA) signaling mechanisms have been studied in a broad variety of plant species using complementary analyses, taking advantage of different methodologies suitable for each plant species. Early studies on ABA biosynthesis using Solanum lycopersicum mutants suggested an importance of ABA synthesis in stomatal closure. To understand ABA signaling in guard cells, cellular, biochemical and electrophysiological studies in Vicia faba and Commelina communis have been conducted, providing fundamental knowledge that was further reconfirmed by molecular genetic studies of Arabidopsis. In this article, examples of stomatal studies in several plants and prospects in ABA research are discussed.
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Affiliation(s)
- Izumi C Mori
- Institute of Plant Science and Resources, Okayama University, 2-20-1 Chuo, Kurashiki, Okayama 710-0046, Japan.
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Saito N, Munemasa S, Nakamura Y, Shimoishi Y, Mori IC, Murata Y. Roles of RCN1, regulatory A subunit of protein phosphatase 2A, in methyl jasmonate signaling and signal crosstalk between methyl jasmonate and abscisic acid. PLANT & CELL PHYSIOLOGY 2008; 49:1396-1401. [PMID: 18650210 DOI: 10.1093/pcp/pcn106] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
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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Affiliation(s)
- Naoki Saito
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Okayama 700-8530, Japan
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