Signal Mediators for Phytoalexin Production in Defense Response of Oats Elicited by Victorin as a Specific Elicitor
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概要
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Signals mediating phytoalexin(PA)production were analyzed in primary leaves of oats cv.Iowa X469 treated with an elicitor victorin. Production of the PA avenanthramide A was inhibited by DPI, an inhibitor of NADPH oxidase/nitric oxide synthase(NOS)and the NOS inhibitors L-NMMA and 1, 3-PBIT. However, catalase and superoxide dismutase (SOD)hardly suppressed it. From the data, NO functions as a major reactive oxygen species in signal transduction leading to PA production in the defense response of oats. EGTA, verapamil and ruthenium red inhibited PA production, suggesting that Ca^<2+> influx into the cytoplasm and intracellular Ca^<2+> movement are involved in the defense response. Trifluoperazine, a calmodulin function inhibitor, and K-252a, a serine/threonine kinase inhibitor, also suppressed the accumulation, whereas okadaic acid, a serine/threonine phosphatase inhibitor, did not suppress it, suggesting the involvement of calmodulin and protein kinase, but not of phosphatase in PA production.
- 2000-08-25
著者
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Mayama S
Laboratory Of Plant Pathology Graduate School Of Science And Technology Faculty Of Agriculture Kobe
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NAKAYASHIKI Hitoshi
Laboratory of Plant Pathology, Faculty of Agriculture, Kobe Unoversity
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Hata Shingo
Laboratory Of Plant Pathology Division Of Environmental Science Of Bioresource Production Graduate S
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Tosa Yukio
Fac. Of Agriculture Kobe Univ.
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Tosa Yukio
Laboratory Of Plant Pathology Faculty Of Agriculture Kobe University
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Hata Shingo
Laboratory Of Crop Science Graduate School Of Bioagricultural Sciences Nagoya University
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NAKAYASHIKI Hitoshi
Faculty of Agriculture, Kobe University
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TADA Yasuomi
Laboratory of Plant Pathology, Graduate School of Science and Technology, Faculty of Agriculture, Ko
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MIYAMA Shigeyuki
Laboratory of Plant Pathology, Division of Environmental Science of Bioresource Production, Graduate
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Nakayashiki Hitoshi
Faculty Of Agriculture Kobe University
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Nakayashiki Hitoshi
Laboratory Of Plant Pathology Graduate School Of Agriculture Kyoto University
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Nakayashiki Hitoshi
Laboratory Of Plant Pathology Graduate School Of Agricultural Science Kobe University
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