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.
