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KMID : 0379120230510030205
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Korean Journal of Mycology
2023 Volume.51 No. 3 p.205 ~ p.217
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Physiological Functionalities and Enzyme Activities of Non-pathogenic Pigmented Wild Yeasts
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Moon Jeong-Su
Shin Seung-A
Baek Seung-Eun
Lee Jong-Soo
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Abstract
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This study aimed to produce novel bioactive compounds from non-pathogenic pigmented wild yeasts. Culture upernatants and cell-free extracts of non-pathogenic pigmented yeast strains were prepared, and their physiological functionalities and enzyme activities were measured. Cell-free extracts from Rhodosporidium paludigenum HHGG35-1 and culture supernatants from Rhodosporidium diobovatum NMD18-1 demonstrated very high antioxidant activity (76.6%) and anti-gout xanthin oxidase inhibitory activity (86.2%), respectively. Maximal production of the antioxidants (76.9%) was obtained when Rh. Paludigenum HHGG35-1 was cultured in a yeasts extract-peptone-dextrose (YPD) medium (pH 6.5) at 30℃ for 24 h. The xanthin oxidase inhibitor was also maximally produced (91.6%) when Rh. Diobovatum NMD18-1 was cultured at 30℃ for 96h in a YPD medium (pH 6.5). Rh. Paludigenum HHGG35-1 was oval in shape and formed ascospre. The Rh.diobovatum NMD18-1 specimen displayed dimensions of 1.6 x 1.6 ㎛ and produced ascospores; however, it did not form pseudomycelium. Both of Rh. Paludigenum HHGG35-1 and Rh. Diobovatum NMD18-1 grew well in a 40%-glucose-containing YPD medium and 10%-NaCl-containing YPD medium.
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KEYWORD
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Enzyme activity, Physiological functionality, Pigmented wild yeast, Rhodosporidium paludigenum HHGG35-1, Rhodosporidium diobovatum NMD18-1
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