NDLI: Increased diversity in the genus Debaryomyces from Arctic glacier samples

Content Provider	Springer Nature Link
Author	Jacques, émie Zeuche, Anissa Gunde Cimerman, Nina Casaregola, Serge
Copyright Year	2014
Abstract	Ice from Arctic glaciers contains large populations of yeasts. We studied 38 isolates from this environment, which were initially identified as Debaryomyces sp. related to Debaryomyces hansenii by sequence analysis of the D1/D2 domains of 26S rDNA. An analysis of the distribution of mitochondrial DNA insertions in the nuclear genome showed that 25 of these isolates were related to, but distinct from, D. hansenii. Sequence analysis of the ACT1 gene of these 25 isolates revealed that they formed three different types of putative hybrids. In particular, 23 putative hybrids carried an ACT1 sequence identical to that of three Debaryomyces strains, CBS 790, CLIB 660, CLIB 949, previously classified as associated with D. hansenii and an ACT1 sequence of an undescribed taxon. The latter sequence displayed between 22 and 27 bp divergence (2.6–3.2 %) over 841 bp from sequences of closely related Debaryomyces sp., suggesting that this new taxon very likely represents a novel species for which no pure strain is available. Sequence comparisons of CBS 790, CLIB 660, and CLIB 949 with related Debaryomyces type strains also revealed an important sequence divergence. The putative hybrids described in this study could be differentiated from non-hybrid isolates and other Debaryomyces species on the basis of their use of a number of carbon sources.
Starting Page	487
Ending Page	501
Page Count	15
File Format	PDF
ISSN	00036072
Journal	Antonie van Leeuwenhoek
Volume Number	107
Issue Number	2
e-ISSN	15729699
Language	English
Publisher	Springer International Publishing
Publisher Date	2014-12-06
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Yeast Molecular taxonomy Saccharomycotina Arctic glaciers ACT1 Hybrid Microbiology Medical Microbiology Plant Sciences Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Biology Microbiology

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