Influence of carbon nitrogen and ral sources on growth and prediction of tannase by A. flavus and A. oryzae

Abstract

The influence of carbon and nitrogen sources and of mineral salts on the growth and tannase production by A. flavus and A. oryzoe was investigated. Both the aspergillus species were found to utilize sucrose as the principal carbon source for maximum growth and tannase production. As a nitrogen source, glutamic acid and urea were found responsible for, optimum growth and tannase activity by A.flavus and A. oryzae resprctively. Thiourea greatly affected growth and tannase activity of both the aspergillus species. Tannase production and mould growth were appreciably increased by the presence of Mg⁺⁺ Cu⁺⁺ and Mn⁺⁺ in the medium. Co⁺⁺ and MO⁺⁺ salts suppressed tannase formation by both the mould species.