2007 Fiscal Year Final Research Report Summary
Lipid signal molecules from plastid and plant immune responses
| Project/Area Number |
17370019
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
植物生理・分子
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| Research Institution | Kyushu University |
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Principal Investigator |
IBA Koh Kyushu University, Faculty of Sciences, Professor (10192501)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUDA Osamu KYUSHU UNIVERSITY, Faculty of Sciences, Assistant Professor (60346765)
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| Project Period (FY) |
2005 – 2007
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| Keywords | trienoic fatty acids / jasmonic acid / Oryza sativa / Magnaporthe grisea / oxylipin |
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| Research Abstract |
Linolenic acid (18:3) is the most abundant fatty acid in plant membrane lipids and is a source for various oxidized metabolites, called oxylipins. 18:3 and oxylipins play important roles in the induction of defence responses to pathogen infection and wound stress in Arabidopsis. However, in rice, endogenous roles of 18:3 and oxylipins in disease resistance have not been confirmed. We generated 18:3-deficient transgenic rice plants (F78Ri) with co-suppression of two ω-3 fatty acid desaturases, OsFAD7 and OsFAD8 that synthesize 18:3. The F78Ri plants showed enhanced resistant to phytopathogenic fungus Magnaporthe grisea. A typical 18:3-derived oxylipin, jasmonic acid (JA), acts as a signaling molecule in defence responses to fungal infection in Arabidopsis. However, in F78Ri plants, the expression of JA-responsible pathogenesis-related genes, PBZ1 and PRIb was induced after inoculation with M. grisea, although JA-mediated wound response was suppressed. Furthermore, the application of JA methyl ester had no significant effect on the enhanced resistance in F78Ri plants. These results suggest that the enhanced resistance in F78Ri plants might be attributable to the deficiency of 18:3 or 18:3-derived oxylipins except for JA.
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Research Products
(22 results)
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[Journal Article] Enhancement of disease resistance to Magnaporthe grisea in rice by accumulation of hydroxy linoleic acid.2008
Author(s)
Yara, A., Yaeno, T., Montillet, J. L., Hasegawa, ML, Seo, S., Kusumi K., Iba, K.
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Journal Title
Biochem. Biophys. Res. Commun. 370
Pages: 344-347
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Resistance to Magnaporthe grisea in transgenic rice with suppressed expression of genes encoding allene oxide cyclase and phytodienoic acid reductase.2008
Author(s)
Yara, A., Yaeno, T., Hasegawa, M., Seto, H., Seo, S., Kusumi, K., Iba, K.
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Journal Title
Biochem. Biophys. Res. Commun. 376
Pages: 460-465
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Disease resistance against Magnaporthe grisea is enhanced in transgenic rice with suppression of ω-3 fatty acid desaturases.2007
Author(s)
Yara, A., Yaeno, T., Hasegawa, T., Seto, H., Montillet, J. -L., Kusumi, K., Seo, S., Iba, K.
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Journal Title
Plant Cell Physiol. 48
Pages: 1263-1274
Description
「研究成果報告書概要(欧文)」より
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