Pichia bruneiensis sp. nov., a biofilm-producing dimorphic yeast species isolated from flowers in Borneo

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Abstract

Taxonomic analysis of five yeast strains isolated from Hibiscus flowers in Brunei (Borneo) is described. The strains represent a dimorphic, biofilm-producing, anamorphic budding yeast species for which the name Pichia bruneiensis is proposed. P. bruneiensis alternates between yeast and pseudohyphal modes of growth. The pseudohyphae form biofilms on the surface of liquid media and penetrate into solid substrates. The sequences of the D1/D2 domains of the large subunit rRNA genes, the internal transcribed spacer (ITS) regions and the 18S rRNA genes were identical in the five strains and indicated a close phylogenetic relationship with teleomorph species of the genus Pichia. In a phylogenetic analysis of these sequences, the closest relative of the new species was Pichia fermentans (6 % nucleotide substitutions and indels in the D1/D2 domain). The type strain is 11-485T and has been deposited in the Centralbureau voor Schimmelcultures (Utrecht, the Netherlands) as CBS 12611T, the National Collection of Agricultural and Industrial Micro-organisms (Budapest, Hungary) as NCAIM Y.02019T and the Culture Collection of Yeasts (Bratislava, Slovakia) as CCY 29-189-1T. Mycobank no. MB800537.

Original languageEnglish
Pages (from-to)3099-3104
Number of pages6
JournalInternational journal of systematic and evolutionary microbiology
Volume62
Issue number12
DOIs
Publication statusPublished - dec. 17 2012

ASJC Scopus subject areas

  • Microbiology
  • Ecology, Evolution, Behavior and Systematics

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