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| 著者 | Kano A., Fukumoto T., Ohtani K., Yoshihara A., Ohara T., Tajima S., Izumori K., Tanaka K., Ohkouchi T., Ishida Y., Nishizawa Y., Ichimura K., Tada Y., Gomi K., Akimitsu K. | |
| タイトル | The rare sugar D-allose acts as a triggering molecule of rice defence via ROS generation. | |
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Abstract: Only d-allose, among various rare monosaccharides tested, induced resistance to Xanthomonas oryzae pv. oryzae in susceptible rice leaves with defence responses: reactive oxygen species, lesion mimic formation, and PR-protein gene expression. These responses were suppressed by ascorbic acid or diphenylene iodonium. Transgenic rice plants overexpressing OsrbohC, encoding NADPH oxidase, were enhanced in sensitivity to d-allose. d-Allose-mediated defence responses were suppressed by the presence of a hexokinase inhibitor. 6-Deoxy-d-allose, a structural derivative of d-allose unable to be phosphorylated, did not confer resistance. Transgenic rice plants expressing Escherichia coli AlsK encoding d-allose kinase to increase d-allose 6-phosphate synthesis were more sensitive to d-allose, but E. coli AlsI encoding d-allose 6-phosphate isomerase expression to decrease d-allose 6-phosphate reduced sensitivity. A d-glucose 6-phosphate dehydrogenase-defective mutant was also less sensitive, and OsG6PDH1 complementation restored full sensitivity. These results reveal that a monosaccharide, d-allose, induces rice resistance to X. oryzae pv. oryzae by activating NADPH oxidase through the activity of d-glucose 6-phosphate dehydrogenase, initiated by hexokinase-mediated conversion of d-allose to d-allose 6-phosphate, and treatment with d-allose might prove to be useful for reducing disease development in rice. |
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| 掲載誌 | J. Exp. Bot. | |
| Country | Japan | |
| 刊数 | 64(16) | |
| ページ | 4939-51 | |
| 発刊年 | 2013 | |
| PubMed ID | 24014866 | |
| PubMed Central ID | 3830479 | |
| DOI | 10.1093/jxb/ert282 | |
| URL | - | |
| 関連情報 | ||
| 遺伝子 | HXK5 HXK6 RBOHA RBOHB RBOHC RBOHD _ _ _ _ _ | |
| INSD | - | |
| 系統 |
野生イネ コアコレクション |
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| 突然変異系統(遺伝研 Collection) | - | |
| 種子不稔系統 | - | |
| 致死変異体系統 | - | |
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組織別発生段階 - 突然変異系統(遺伝子) |
- | |
| 栽培イネ品種(遺伝研 Collection) | - | |
| 組織別発生段階 | - | |
