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Studies on the Bioorganic Chemistry of Interaction's Substance between High Plant and Low Plant

高等植物与低等植物相互作用物质的生物有机化学研究

基本信息

批准号：
01303010
负责人：
SAKAMURA Sadao
金额：
$ 6.14万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

项目摘要

While the interaction between higher and lower plants can take many forms, it is the attack of the micro-organism on the higher plant leading to plant disease. We studied bioorganic chemistry concerns the chemistry of interaction's substances between higher plant and pathogenic fungus.Outline of research work is summarized as follow.・ Isolation and structural determination of new phytotoxin, three usnic acid derivatives from the pathogen causing circular leaf spot disease of Japanese persimmon, ampullicin and isoampullicin from fungus obtained from a dead pine tree and syringostatins A and B from the pathogenic bacterial blight of lilac.・ To investigate the structure-activity relationships of host-specific PM-toxin A, a component of the host-specific corn pathotoxin, comparison of their biological activity demonstrated the general structural feature necessary for the potent activity. AM-toxin is know as host-specific toxin, host-specific toxin action mechanism is inverstigated the structure of a toxin-receptor peptide in apple leaves.・ Biochemical defense mechanisms involving both pre- and post infectional changes in the host plant. Study of the protection mechanisms of rice plant against bacterial leaf blight. Oryzalides A and B, and oryzalic acid A, which were isolated from healthy flag leaves of rice plant.Antifungal stress compounds were isolated and identified from adzuki bean that had been treated with C. gregatum type B which is an avirulent strain fungus causing stem rot disease on the host plant.

虽然高等植物和低等植物之间的相互作用可以采取多种形式，但微生物对高等植物的攻击导致植物病害。我们研究的生物有机化学涉及高等植物与病原真菌相互作用物质的化学。研究工作概述如下。·从日本柿圆斑病病原菌中分离得到三种松萝酸衍生物，从松树枯梢真菌中分离得到ampullicin和isoampullicin，从丁香细菌性枯萎病中分离得到三种新的植物毒素A和B。为了研究宿主特异性玉米病原毒素的组分之一--宿主特异性PM毒素A的结构-活性关系，比较它们的生物活性，证明了有效活性所必需的一般结构特征。AM毒素是一种寄主特异性毒素，其作用机制是通过研究苹果叶片中毒素受体肽的结构来确定的。生化防御机制涉及宿主植物感染前后的变化。水稻对白叶枯病的保护机制研究。从健康水稻剑叶中分离得到的抗真菌化合物Oryzalides A、B和Oryzalic acid A。gregatum型B，其是在宿主植物上引起茎腐病的无毒菌株真菌。