Abstract
The astaxanthin synthesis in the yeast Phaffia rhodozyma was shown to depend on the rate of growth occurring in the first two days of cultivation. The growth rate of the yeast culture studied was preset by the cultivation conditions, among which the C : N ratio was decisive. The intense anabolic processes coupled with active culture growth during the first 24 h significantly inhibited the synthesis of the key enzymes involved in astaxanthin synthesis, which led to a marked decrease in the carotenoid production. It was demonstrated that, for the maximum yield of astaxanthin to be obtained from 1 l of nutrient medium, it is necessary to carry out cultivation, beginning with the first day, at a growth rate significantly lower than µmax. The optimum budding rate of the mutant strain Ph. rhodozyma VKPM Y-2409 consistent with the maximum astaxanthin synthesis was determined. The specific astaxanthin productivity of the strain studied was about 7.0 mg/g of dry biomass at a budding rate of <0.5.
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Translated from Mikrobiologiya, Vol. 73, No. 6, 2004, pp. 751–757.
Original Russian Text Copyright © 2004 by Vustin, Belykh, Kishilova.
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Vustin, M.M., Belykh, E.N. & Kishilova, S.A. Relationship between astaxanthin production and the intensity of anabolic processes in the yeast Phaffia rhodozyma. Microbiology 73, 643–649 (2004). https://doi.org/10.1007/s11021-005-0004-0
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DOI: https://doi.org/10.1007/s11021-005-0004-0