Effect of the medium composition on the quantitative and qualitative composition of extracellular proteases of micromycetesстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Местоположение издательства:Road Town, United Kingdom
Первая страница:276
Последняя страница:280
Аннотация:The effect of the medium composition on the quantitative and qualitative composition of extracellular proteases of the fungus Alternaria alternata grown in a protein-containing medium was studied. The addition of inorganic nitrogen to the growth medium substantially reduced extracellular proteolytic activity. The range of extracellular proteases was found to depend on the kind of sugar added to the medium. A particular sugar could not only affect the content of extracellular enzymes but also induce the synthesis of new proteases. The range of extracellular proteases produced by micromycetes grown in the protein-containing medium was species-specific. Of the fungi used in this study, Ulocladium artrum exhibited the widest spectrum of extracellular proteases, whereas the spectrum of proteases secreted by Aspergillus penicillosa was the narrowest. Presumably, the high variability of the quantitative and qualitative composition of the extracellular proteases of mycelial fungi is one of the mechanisms providing for their rapid adaptation to varying environmental conditions.