• Journal of Microbiology and Biotechnology
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• v.17 no.10
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• pp.1591-1597
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• 2007

The production of carotenoids, lipid content, and fatty acid composition were all studied in a strain of Sporobolomyces ruberrimus when using different concentrations of technical glycerol as the carbon source and ammonium sulfate as the nitrogen source. The total lipids represented an average of 13% of the dry weight, and the maximum lipids were obtained when using 65.5 g/l technical glycerol (133.63 mg/g). The optimal conditions for fatty acid production were at $27^{\circ}C$ using 20 g of ammonium sulfate and a pH range from 6 to 7, which produced a fatty acid yield of $32.5{\pm}1\;mg/g$, including $1.27{\pm}0.15\;mg$ of linolenic acid (LNA), $7.50{\pm}0.45\;mg$ of linoleic acid (LLA), $5.50{\pm}0.35\;mg$ of palmitic acid (PA), $0.60{\pm}0.03\;mg$ of palmitoleic acid (PAL), $1.28{\pm}0.11\;mg$ of stearic acid (SA), $9.09{\pm}0.22\;mg$ of oleic acid, $2.50{\pm}0.10\;mg$ of erucic acid (EA), and $4.25{\pm}0.20\;mg$ of lignoceric acid (LCA), where the palmitic, oleic, and linoleic acids combined formed about 37% of the total fatty acids. The concentration of total carotenoids was 2.80 mg/g when using 20 g of ammonium sulfate, and consisted of torularhodin (2.70 mg/g) and $\beta$-carotene (0.10 mg/g), at $23^{\circ}C$ and pH 6. However, the highest amount with the maximum specific growth rate was obtained (${\mu}_{max}=0.096\;h^{-1}$) with an ammonium sulfate concentration of 30 g/l.

• The Korean Journal of Mycology
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• v.43 no.2
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• pp.99-103
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• 2015

We prepared supernatants and cell-free extracts of yeasts isolated from wild flowers in Korea, and their antioxidant activity and inhibitory activities of xanthine oxidase and tyrosinase were investigated. Among them, cell-free extracts of Kuraishia capsulata UL40-2 and Sporobolomyces ruberrimus 121-Z-3 showed significantly high xanthine oxidase inhibitory activity of 46.4% and 48.3%, respectively. Starmerella bombicola 80-J-1 also showed tyrosinase inhibitory activity of 36.2% in the cell-free extract. Other antioxidant activities and tyrosinase inhibitory activities were not detected or were below 20%. Maximal production of the xanthine oxidase inhibitors were observed when Kuraishia capsulate UL40-2 and Sporobolomyces ruberrimus 121-Z-3 were cultured in the yeast extract-peptone-dextrose media at $30^{\circ}C$ for 24 hour, respectively.

• The Korean Journal of Mycology
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• v.41 no.1
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• pp.47-51
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• 2013

Yeasts isolated from wild flowers of Gyejoksan in Daejeon city, Oseosan in Chungchungnamdo, and Baekamsan in Jeollabukdo, Korea were identified by comparison of nucleotide sequences for PCR-amplified D1/D2 region of 26S rDNA or internal transcribed spacer (ITS) 1 and 2 including 5.8S rDNA using BLAST. Twelve yeast strains of ten species and seventeen yeast strains of ten species were isolated from wild flowers of Gyejoksan and Oseosan, respectively. And thirty seven yeast strains of twenty four species were isolated from wild flowers of Baekamsan. Total thirty four yeast species were isolated from three different sample collection areas, but only nine species were overlapped from the at least two different sampling areas: Cryptococcus sp., Cryptococcus aureus, Cryptococcus flavescens, Cryptococcus flavus, Metschnikowia sp., Pseudozyma aphidis, Rhodotorula glutinis, Sporobolomyces carnicolor, and Sporobolomyces ruberrimus. Among them only Cryptococcus aureus was occurred from all three different collection sites. Other twenty five species were restricted to specific collection site suggesting that each area has distinctive yeast flora.

• Microbiology and Biotechnology Letters
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• v.41 no.4
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• pp.383-390
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• 2013

Several yeasts were isolated from flowers found in Gyonggi-do Province and Jeju island in Korea. They were then identified by a comparison of their PCR-amplified D1/D2 regions of 26S rDNA, internal transcribed spacer 1 and 2 inclusive of 5.8S rDNA, using the BLAST database. A total of fifty four yeast strains were isolated from wild flowers in Gyonggi-do and the genus Pseudozyma was noted as being dominant. A total of thirty two strains were isolated from Songaksan and Seongsan-ilchulbong in Jeju island and Sporobolomyces ruberrimus was seen to be dominant. The anti-gout xanthine oxidase inhibitory activities of the culture broths and cell-free extracts from eighty six yeast strains were then determined. The cell-free extracts of Pseudozyma hubeiensis 228-S-1 exhibited the highest xanthine oxidase inhibitory activity of 19.6%. The XOD inhibitor was also maximally produced when Pseudozyma hubeiensis 228-S-1 was cultured at $30^{\circ}C$ for 36h in YEPD medium.