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• W4313199829 endingPage "100927" @default.
• W4313199829 startingPage "100927" @default.
• W4313199829 abstract "The development of microbial cell factories is nowadays a main route for the production of safe and environmentally friendly bioactive compounds. Rhodosporidium kratochvilovae yeasts constitute an unexplored source for the production of natural carotenoids, thus further insights on their metabolism and fermentative behavior would contribute towards the sustainable synthesis of bioactive compounds. The aim of this study was to investigate the ability of two R. kratochvilovae isolates (FMCC Y-42 and Y-43) to produce carotenoids under different experimental conditions. Cell growth, carotenoid synthesis and lipid accumulation were evaluated using synthetic media containing either glucose or mixtures of glucose:galactose (1:1), under different carbon-to-nitrogen (C/N) ratios. Carotenogenesis was highly affected by C/N ratio in both strains, while a competitive trend with lipid accumulation was also observed. Yeast strain Y-42 reached the highest concentration of total carotenoids (2.59 mg/L) when grown on glucose-based medium at a C/N ratio of 80 after 39 h of fermentation. Likewise, the strain Y-43 produced approximately 2 mg/L of total carotenoids from both glucose (C/N of 80) and its mixture with galactose (C/N 80 and 120), with similar biomass concentration (9.3, 10.3 and 10.9 g/L, respectively). HPLC-DAD analysis of carotenoid extracts indicated that the main carotenoid was β-carotene (60–75%) followed by γ-carotene (9–18%), torulene (6–13%) and torularhodin (5–17%), regardless the fermentation conditions or the strain-employed. This is the first study to reveal γ-carotene synthesis by R. kratochvilovae strains. The obtained results provided new knowledge on the production of natural carotenoids by novel red yeast strains and could pave the way towards their application in sustainable functional food products and nutraceuticals." @default.
• W4313199829 created "2023-01-06" @default.
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• W4313199829 date "2023-04-01" @default.
• W4313199829 modified "2023-10-17" @default.
• W4313199829 title "Exploring the potential of novel R. kratochvilovae red yeasts towards the sustainable synthesis of natural carotenoids" @default.
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• W4313199829 doi "https://doi.org/10.1016/j.scp.2022.100927" @default.
• W4313199829 hasPublicationYear "2023" @default.
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