Isolation and Determination of Microbiological Characteristics of Unrecorded Wild Yeasts from Waters and Soils of Haegeumgang in the Southern Sea, and from Namdaecheon and Geumsancheon Upstream of Geumgang, Korea

Abstract

The goal of this study was to investigate the diversity of wild yeasts from the waters and soils of Haegeumgang in Gyungsangnam-do, and Namdaecheon and Geumsancheon in upstream of Geumgang, Korea and to characterize any previously unrecorded wild yeast strains. In total, 52 strains comprising 22 different species of wild yeasts were isolated from 35 samples obtained from Haegeumgang. Forty three and sevent nine wild yeast strains were isolated from 90 samples taken from Namdaecheon and Geumsancheon, respectively. Among the total 174 isolated wild yeast strains, 4 strains, i.e., Exobasidium rhododendri HGG10-5 (NNIBR2022633FG1), Udeniomyces pyricola NDC29-1 (NNIBR2022633FG2), Diddensiella caesifluorescens GSC2-2 (NNIBR2022633FG5) and Pichia scaptomyzae BAC2-3 (NNIBR2022633FG4) were previously unrecorded yeasts were oval or spherical in shape, only Pichia scaptomyzae BAC 2-3 formed ascospores. Three strains with the exception of Udeniomyces pyricola NDC 29-1 grew well in vitamin-free medium and Exobasidium rhododendri HGG 10-5 grew well in YPD medium containing 10% NaCl. All four novel strains assimilated fructose, lactose, raffinose, starch and xylose.

Keywords

• geumsancheon
• haegeumgang
• namdaecheon
• microbiological characterteristics
• unrecorded wild yeasts