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Factors enhancing the accumulation of β-carotene in rhodotorula taiwanensis CT1

β-carotene known as an antioxidant, immunostimulant, provitamin A and natural colour is a popular additive used in food, cosmetics, and animal feed. Microbial β-carotene currently attracts attention thanks to its shorter production time and controllable process in comparison to β-carotene from plant source. This study investigates the factors that enhance the accumulation of β-carotene in the yeast strain Rhodotorula taiwanensis CT1. The addition of stressors including ethanol (0.2 %), hydrogen peroxide (10 mM), and NaCl (1 M) to the 48 h CT1 cultures improved the intracellular β-carotene yield by 2.2; 2.05 and 1.35 folds, respectively. |