Summary
The effect of physical and nutritional factors on the production of pigments byMonascus purpureus FRR 2190 was studied using cultures grown on both rice and a synthetic medium that was solidified with carrageenan and extruded into rice-like particles. Pigment yield was highly sensitive to physical parameters. Optimal pigment formation in rice cultures occurred at an initial pH of 6 and an initial moisture content of 56%. Lower moisture contents led to a large decrease in pigment concentration. Red and yellow pigment production on solidified gel media was increased up to three-fold compared to that of liquid cultures of the same medium composition, particularly when peptone was used as the sole nitrogen source. Solid state rice cultures gave the highest pigment yields.
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Johns, M.R., Stuart, D.M. Production of pigments byMonascus purpureus in solid culture. Journal of Industrial Microbiology 8, 23–28 (1991). https://doi.org/10.1007/BF01575587
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DOI: https://doi.org/10.1007/BF01575587