Phytotoxic Metabolites Isolated from Scolecotrichum graminis Fuckel
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概要
- 論文の詳細を見る
Two new cercosporins, (+)-isocercosporin (1) and (+)-14-acetylisocercosporin (2), were isolated from culture filtrates of Scolecotrichum graminis Fuckel, which is the causal fungus of a leaf streak disease in orchardgrass. The structure of each was elucidated by spectroscopic analysis, and (+)-isocercosporin (1)is the first isolated enantiomer of known (-)isocercorporin (8b). Compounds 1 and 8b had higher phytotoxic activity than that of (+)-cercosporin (a), an atropisomer of 8b. The results of the bioassay suggest that the phytotoxic activity of cercosporins depends on the relative configuration, and not on the absolute configuration. In addition, three phenol compounds, 1-(2, 4-dihydroxy-6-methylphenyl) ethanone (3), isosclerone (4), and trans-3,4-dihydro-3,4,8-trihydroxy-1(2H)-naphthalenone (5), were isolated as minor components and identified. Compound 3 was isolated for the first time as a natural products.
- 社団法人日本農芸化学会の論文
- 1994-11-23
著者
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ICHIHARA Akitami
Department of Bioscience and Chemistry, Faculty of Agriculture, Hokkaido University
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TAJIMI Akitoshi
Hokkaido National Agricultural Experiment Station
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Ichihara A
Hokkaido Univ. Sapporo Jpn
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Tabuchi Hiroyasu
Department of Bioscience and Chemistry, Faculty of Agriculture, Hokkaido University
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Ichihara Akitami
Department Of Applied Bioscience Graduate School Of Agriculture Hokkaido University
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Tabuchi Hiroyasu
Department Of Bioscience And Chemistry Faculty Of Agriculture Hokkaido University
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ICHIHARA Akitami
Department of Agricultural Chemistry, Faculty of Agriculture, Hokkaido University
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