The Korean Journal of Mycology (한국균학회지)

The Korean Society of Mycology (한국균학회)
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Isolation and Diversity of Wild Yeasts from the Waters and Bank Soils of Daejeoncheon, Gapcheon, and Yudeungcheon in Daejeon Metropolitan City, Korea

대전광역시 대전천과 갑천 및 유등천의 물과 주변 토양들로부터 야생효모들의 분리 및 분포 특성

  • Han, Sang-Min (Department of Biomedicinal Science and Biotechnology, Paichai University) ;
  • Lee, Sang-Yeop (Department of Biomedicinal Science and Biotechnology, Paichai University) ;
  • Kim, Ha-Kun (Department of Biomedicinal Science and Biotechnology, Paichai University) ;
  • Lee, Jong-Soo (Department of Biomedicinal Science and Biotechnology, Paichai University)
  • 한상민 (배재대학교 바이오.의생명공학과) ;
  • 이상엽 (배재대학교 바이오.의생명공학과) ;
  • 김하근 (배재대학교 바이오.의생명공학과) ;
  • 이종수 (배재대학교 바이오.의생명공학과)
  • Received : 2017.10.12
  • Accepted : 2017.11.07
  • Published : 2017.12.01
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Abstract

In order to investigate the diversity of yeasts from major rivers (the Daejeoncheon, Gapcheon and Yudeungcheon) located in Daejeon city, we isolated wild yeasts by plating diluents of samples collected during the summer and winter of 2016 onto yeast extract-peptone-dextrose (YPD) medium, then identified them using Basic Local Alignment Search Tool (BLAST) analysis to compare the nucleotide sequences of the PCR amplicons for the D1/D2 domain of 26S rDNA. In total, we isolated 191 yeast strains belonging to 104 species from 148 soil or water samples from the rivers and their junctions. Candida spp. (45 strains) including Candida tropicalis (22 strains) were the most abundantly isolated strains from the Daejeoncheon. Candida spp. (16 strains) including Candida vartiovaarae (8 strains) and Candida spp. (18 strains) such as Candida sake (4 strains) were also the dominant isolates from the Gapcheon and Yudeungcheon, respectively. In conclusion, Candida spp. and Cryptococcus spp. were the most dominant strains, corresponding to 42% and 7% of the 191 yeast strains isolated in this study, respectively.

대전광역시 하천들의 효모 종 다양성을 조사하기 위하여 먼저 대전광역시 동남부와 시내를 흐르는 대전천과 서남부의 갑천에 있는 물과 주변 토양들을 2016년 8월과 2017년 2월에 각각 148점을 동일 장소에서 채취하여 야생효모들을 분리, 동정하였다. 여름 채취 물과 주변 토양 74점에서 23종 37균주의 야생효모들이 분리된 반면에 겨울 채취 시료들에서는 약 2배 이상 많은 34종 83균주가 분리되었다. 이들 3대 하천에서 가장 많이 분리된 야생효모는 Candida속 균으로 전체 42%이었고 Cryptococcus속 균과 식품에서 주로 분리되는 Saccharomyces속 균들이 각각 7%와 6%로 많이 분리되었다. 종 수준에서는 Candida tropicalis가 25균주로 가장 많았으며 여름 시료와 겨울 시료에서 공통으로 분리된 효모들은 Aureobasidium pullulans 등 13종이었다.

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References

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