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Stringent government regulations and increasing public awareness is forcing chemical industries to incorporate environment friendly products and processes. Biotechnological applications, in industries, thus, hold great future. Microorganisms and their metabolites/enzymes provide a number of eminenteconomic as well as environment friendly solutions for such industries. Amylases are one of the most important industrial enzymes. Commercial production of amylases requires selection of the best of production conditions. This study evaluates the influence of varying concentration of Ferrous sulphate (Fe2+) on microbial growth and amylase production for Aspergillus, Aspergillus fumigatus NTCC1222. Ferrous sulphate enhanced growth (concentration of 100mg/L) by 1.83%, compared to the control. In contrast, it decreased amylase activity at all concentrations tested. As the concentration of ferrous sulphate increased, the amylase activity decreased. Amylases are metalloenzymes and the inhibition in amylase activity observed in the presence of ferrous ions may be due to competition between the exogenous cation and the protein associated cation, resulting in reduced metalloenzyme activity. Further studies will aim to evaluate the effect of different ferrous salts and different forms of iron on amylase production by Aspergillus fumigatus NTCC1222.

Influence of Ferrous Sulphate on Growth and alpha- Amylase Production for Aspergillus fumigatus NTCC1222