220.
Aspergillus niger is widely used as an enzyme source in industries. Considering its enzymic potential,
A. niger was studied for its acid phosphatase (EC 3.1.3.2, orthophosphoric monoester phosphohydrolase), and invertase (EC 3.2.1.26,
β-fructofuranoside fructohydrolase) activity in defined media supplemented with 1%, 3%, or 5% sucrose concentrations. Both
these enzymes play a key role in phosphate and carbon metabolism in plants, animals, and microorganisms and hence are interesting
from the standpoint of biotechnological applications. Ontogenic changes in extracellular, cytoplasmic, and wall-bound enzyme
activities of
A. niger were studied. Growth in terms of fresh weight showed inverse correlation with pH. At higher pH values, both enzyme activities
were higher in the medium supplemented with low sucrose concentration. It was observed that the more the fresh weight of fungi
decreased, the greater was the enzyme activity observed. It is suggested that these enzymes may participate in autolysis of
fungi and, on the other hand, could prove to be a potential source of industrial application and exploitation.
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