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Pichia bovicola sp. nov., a yeast species associated with small-intestinal content of cattle

Jirameth Angchuan1, Varunya Sakpuntoon1, Savitree Limtong1,2,3

  • 1Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.

International Journal of Systematic and Evolutionary Microbiology
|March 2, 2022
PubMed

Insights

Three novel yeast strains from cattle in Thailand were identified as a new species, *Pichia bovicola*. This discovery expands our understanding of yeast diversity in animal gastrointestinal tracts.

Area of Science:

  • Microbiology
  • Mycology
  • Yeast Taxonomy

Background:

  • Investigating yeast diversity in cattle gastrointestinal tracts.
  • Isolation of yeast strains from cattle small-intestinal content in Thailand.

Purpose of the Study:

  • To identify and classify novel yeast species from cattle.
  • To characterize the phylogenetic relationship of isolated yeast strains.

Main Methods:

  • Isolation and cultivation of yeast strains.
  • Molecular identification using D1/D2 domain of large subunit (LSU) rRNA gene and internal transcribed spacer (ITS) region sequencing.
  • Phylogenetic analysis based on sequence data.

Main Results:

  • Three yeast strains (DMKU-MP6-4T, DMKU-MP2-6, DMKU-MP5-1) were identified as a novel species within the genus *Pichia*.
  • The novel species, named *Pichia bovicola*, showed distinct genetic differences from its closest relative, *Pichia exigua*.
  • The yeast species produces 1–4 ascospores per ascus, which are spherical to ellipsoidal and vary in size.

Conclusions:

  • The three isolated yeast strains represent a new species, *Pichia bovicola*.
  • This finding contributes to the knowledge of yeast biodiversity in bovine gastrointestinal environments.
  • The proposed holotype for the new species is DMKU-MP6-4T (TBRC 15616T=PYCC 8905T).
Keywords:
PiaPichia bovicolaThailandnovel yeast species

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