Novel Phytotoxins Produced by the Causal Fungus of the Shoot Blight of Larches
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概要
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From the myceliumof Guignardia laricina, four pigments and three other compoundswere isolated and their structures were determined to be 6-ethyl-5-hydroxy-2, 7-dimethoxy-l, 4-naphthoquinone (I), 6-(l-ethoxyethyl)-5-hydroxy-2, 7-dimethoxy-l, 4-naphthoquinone (II), 6-(l-hydroxyethyl)-5-hydroxy-2, 7-dimethoxy-1, 4-naphthoquinone (III), 6-ethyl-1-acetonyl-1, 5-dihydroxy-2, 7-dimethoxy-4-naphthalenone (IV), ergosterol peroxide (V), 9, 1 1-dehydroergosterol peroxide (VI) and isoevernin aldehyde (VII). II, III and IV were new compounds and VII was found for the first time in nature. In the lettuce seedling test, II and III showed remarkable phytotoxicity. V, VI and VII were less active and I and IV were inactive at the concentration tested. Furthermore, III showed strong activity not only in a larch leaf spot test, but also in the antimicrobial assay.
- 社団法人 日本農芸化学会の論文
著者
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Sakamura Sadao
Department Of Agricultural Chemisitry Faculty Of Agriculture Hokkaido University
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OTOMO Naoya
Department of Agricultural Chemistry, Faculty of Agriculture, Hokkaido University
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SATO Hiroji
Department of Agricultural Chemistry, Faculty of Agriculture
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