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Background: Aflatoxins are produced by a variety of fungal species and these have contributed to devastating health problems globally. However, apart from the capability of the production of aflatoxins, the productions of enzymes by like fungi have been explored. Materials and Methods: Toxigenic strains of Aspergillus flavus (A1), Aspergillus parasiticus (A2), Penicillium citrinum (P1) and Penicillium rubrun (P2) isolated from rice were grown on a defined medium with varying carbon and nitrogen sources. They were also grown on rice as sole carbon and nitrogen source for fungal growth. Extracellular α-amylase produced were subjected to ammonium sulphate precipitation (40 - 90% saturation) followed by dialysis. Results: The toxigenic strains of Aspergillus flavus (A1), Aspergillus parasiticus (A2), Penicillium citrinum (P1) and Penicillium rubrun (P2) were able to produce α-amylases in both the growth medium with varying C and N sources of fungal and also in the rice medium. The most active α-amylase activity was produced by toxigenic A. flavus (A1) with a value of 3.25 + 0.15 Units and this was when ammonium sulphate was nitrogen source with starch as carbon source of fungal growth in the defined growth medium. Conclusion: Toxigenic strains of Aspergillus flavus (A1), Aspergillus parasiticus (A2), Penicillium citrinum (P1) and Penicillium rubrun (P2) used in this investigation can be explored for the industrial production of α-amylases.

α-Amylase Production by Toxigenic Strains of Aspergillus and Penicillium