Abstract
A strain of Penicillium sclerotiorum (NRRL 2074) was found to be a good carotene producer in standing culture on wort medium in light. This fungus strain produced more than 1 mg. of total carotene per gram of dry mycelium, of which approximately 65% was β-carotene and approximately 25% was γ-carotene. In addition, as minor pigments, α-carotene, three cis isomers of β-carotene, two cis isomers of γ-carotene, and α-carotene were identified. A second strain, Penicillium sclerotiorum (NRRL 2076), also produced carotenoid pigments, but it was inferior to NRRL 2074.
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