JOURNAL OF LIGHT INDUSTRY

CN 41-1437/TS  ISSN 2096-1553

Volume 37 Issue 4
August 2022
Article Contents
ZHANG Zhiping, DUAN Naixin, WEI Xiangnan, et al. Optimization of fermentation conditions for high value carotenoid synthesis by Rhodotorula glutinis under light stress[J]. Journal of Light Industry, 2022, 37(4): 10-17. doi: 10.12187/2022.04.002
Citation: ZHANG Zhiping, DUAN Naixin, WEI Xiangnan, et al. Optimization of fermentation conditions for high value carotenoid synthesis by Rhodotorula glutinis under light stress[J]. Journal of Light Industry, 2022, 37(4): 10-17. doi: 10.12187/2022.04.002 shu

Optimization of fermentation conditions for high value carotenoid synthesis by Rhodotorula glutinis under light stress

  • Received Date: 2022-02-21
  • Taking simulated sunlight as abiotic environmental stress condition, the fermentation conditions of carotenoid synthesis by Rhodotorula glutinis were optimized by single factor test and orthogonal test. The effects of hight stress on growth of Rhodotorula glutinis and carotenoid synthesis were studied. The results showed that the light intensity of 5000 Lux could significantly increase the biomass and carotenoid yield. The type of carbon sources had the greatest effect on carotenoid biosynthesis. Glycerol and glucose could be better used to synthesize carotenoids. The optimal fermentation conditions were glycerol concentration of 20 g/L, yeast powder addition of 3.5 g/L, the initial pH value 5.0 and temperature of 25 ℃. After cultured in 5 L fermentor for 144 h, the biomass and carotenoid yield reached 14.2 g/L and 17.3 mg/L, respectively, which were 24.5% and 21.0% higher than those before optimization; Light stress could not only increase the yield of carotenoids, but also effectively increase the proportion of high value-added carotenoids (torularhodin and torulene) in the product.
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