Studies on Resistance Mechanisms of Rice against Bacterial Blight Caused by Xanthomonas oryzae pv. oryzae(Lectures by the Winners of the Society Fellowship)

概要

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Xanthomonas oryzae pv. oryzae (Xoo) is a causal agent of bacterial blight, one of the most serious diseases of rice plants, characterized by yellowing, wilting, and desiccation. The causal bacterium is Gram negative and non-spore-forming, rod-shaped with round ends and a monotrichous flagellum. The pathogen occurs in all rice-growing areas of Asia, Australia, West Africa, North America and South America. Chemical control of bacterial blight has not yet been completely successful; control efforts have focused mainly on breeding for disease resistance. Systematic attempts to deyelop bacterial blight-resistant rice cultivars in Japan did not begin until after the highly resistant cultivar Asakaze was severely attacked in 1957-the first time a resistant cultivar was found to be susceptible to a bacterial pathotype. The epidemic also made Japanese plant pathologists and breeders aware of the importance of resistance mechanisms in rice. I will review our work on the resistance mechanisms of rice cultivars in response to Xoo, especially bacterial races and cultivar resistance, genetic analysis of resistance, induced resistance, protective reaction, antibacterial compounds in rice leaves and hrpXo genes in rice-bacterium interactions.
日本植物病理学会の論文
2002-08-25