PJB-1980-7
Effect of different oxygen pressures and of age on changes in catalase and peroxidase activities of rhizopus oryzae under high pressures of oxygen.
Soaliha ahmed
Abstract
Changes in catalase activity of
rhizopus oryzae on ethanol medium under high pressures of oxygen varied with varying pressure. The optimum pressure for induced increase of catalase was found to be
4 atmospheres. This induced increase in catalae activity was affected by the age of fungus culture , 44 and 69 hour old cultures showed a decrease in enzyme activity under high pressure of oxygen, whereas an increase was observed in 24 hour old culture. Long term studies under optimum pressure and age revealed that the induced changes in catalase
and peroxidase activities of R. oryzae are essentially similar under HPO. Where as alchol dehydrogenase exhibits a decrease instead of an increase . these changes in enzyme activities in response to HPO are reversible on returning the treated samples to air.
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