Lachancea quebecensis sp. nov., a yeast species consistently isolated from tree bark in the Canadian province of Québec

Int J Syst Evol Microbiol. 2015 Oct;65(10):3392-3399. doi: 10.1099/ijsem.0.000426.


A thorough sampling of maple, oak, birch, and apple tree bark in North America yielded a set of isolates that represent a yeast species not yet formally described. The strains obtained were all isolated from the Canadian province of Québec. These four isolates have identical electrophoretic karyotypes, distinct from other species of the genus Lachancea, and are most closely related to the formally recognized species Lachancea thermotolerans according to the D1/D2 domain of the LSU rDNA gene and 5.8S–ITS region. Previous studies revealed the existence of a population of strains closely related to L. thermotolerans, with unique D1/D2 sequences and the ability to grow on melibiose, which is also true for these isolates. The sequences obtained here (for the D1/D2, and 5.8S–ITS region) are identical among the four strains, and in a phylogenetic analysis of the D1/D2 region, the strains form a distinct clade with the previously described population closely related to L. thermotolerans, composed of isolates from Japan, as well as from the provinces of Ontario and Québec in Canada. On the basis of select physiological and phylogenetic characteristics, a novel ascosporogenous yeast species, Lachancea quebecensis sp. nov., is proposed. The type strain LL11_022T ( = CBS 14138T = CLIB 1763T = UCDFST 15-106T) was isolated from maple tree bark in the Station Duchesnay, QC region of Québec, Canada. The MycoBank number is MB811749.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acer / microbiology
  • Betula / microbiology
  • DNA, Fungal / genetics
  • DNA, Ribosomal Spacer / genetics
  • Karyotyping
  • Malus / microbiology
  • Molecular Sequence Data
  • Mycological Typing Techniques
  • Phylogeny*
  • Plant Bark / microbiology*
  • Quebec
  • Quercus / microbiology
  • Saccharomycetales / classification*
  • Saccharomycetales / genetics
  • Saccharomycetales / isolation & purification
  • Sequence Analysis, DNA
  • Trees / microbiology


  • DNA, Fungal
  • DNA, Ribosomal Spacer

Associated data

  • GENBANK/KP793239
  • GENBANK/KP793240
  • GENBANK/KP793241
  • GENBANK/KP793242
  • GENBANK/KP793243
  • GENBANK/KP793244
  • GENBANK/KP793245
  • GENBANK/KP793246