| Abstrakt: |
The parental strain Trichoderma viride and 3 colour mutants (milk white, yellow and brown) blocked at various stages of colony pigmentation derived from it were characterized. The parental strain and the mutants exhibited different growth rates. The identical type of induced fluorescence was observed in all the strains. Hyphae and septa lighted first, whereas reproduction structures did not; after treatment with fluorescein-isothiocyanate and Blankophor RKH the growing hyphal apices were accentuated. In the mutants conidiation was induced at 1-, 2- and 3-d intervals, similarly to the parent strain. Pigmentation of conidiation rings depended on their type and age. The yellow and brown mutants excreted chromatographically different pigments, extractable with ethylacetate, into the medium. Two anthraquinone pigments, viz. 1,3,6,8-tetrahydroxyanthraquinone ( 1) and 1-acetyl-2,4,5,7-tetrahydroxyanthraquinone ( 2) were isolated from the brown mutant (Betina et al. 1986). [ABSTRACT FROM AUTHOR] |
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