Riboflavin Production by Molds

Very little information is at hand regarding the ability of molds to synthesize riboflavin. Few citations pertaining directly to riboflavin production by true molds are available. Pontovich (1943) found as much as 2 mg riboflavin per g of Aspergillus flavus mycelium. Tanner et at. (1945) determined the quantity of riboflavin in the submerged fermentation media of Penicillium chrysogenum. The highest value found was 1. 36 mg per ml. The primary purpose of this study was to screen several hundred isolates, recently obtained from soil, crop residues, and composts, for their ability to produce riboflavin on a wheat bran substrate