Mutational Effect and Genetic Regulation in the Production of Citric Acid from Aspergillus niger

Aspergillus niger popularly known as industrial workhorse due to its fitness for industrial fermentation, has the potentials to secret citric acid. In view of surges in demand and growing markets for citric acid, the major attempt in this work was to determine how the product titres can be maximized. A. niger strains were isolated from various food substances. These strains were exposed to UV radiation at 356nm followed by subsequent subjection of the mutant strains to a medium containing chlorate as mutagen.