Studies on induced mutants of Cephalosporium gregatum, the causal fungus of brown stem rot in adzuki beans.

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  • アズキ落葉病菌の誘導突然変異株について
  • アズキ落葉病菌の誘導突然変異株について〔英文〕
  • アズキ ラクヨウビョウキン ノ ユウドウ トツゼン ヘンイカブ ニ ツイテ エ

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Abstract

Mutagenesis was induced in Cephalosporium gregatum Type A isolates by using N-methyl-N'-nitro-N-nitrosoguanidine and UV irradiation as mutagens. The morphological properties of the induced mutants grown on the medium of soybean stem agar was almost the same as those of the parent isolates, but some of their cultural characteristics on potato dextrose agar medium, gregatin productivity and pathogenicity differed significantly from those of parent isolates. Another metabolite different from gregatins was isolated from culture filtrates of the mutants and was identified to be the same compound (ascochlorin) isolated from some phytopathogenic fungi.

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