Redefinition of Aureobasidium pullulans and its varieties
| Autor: | M. Sudhadham, Viktor Uršič, Nina Gunde-Cimerman, Polona Zalar, Cene Gostinčar, G.S. de Hoog |
|---|---|
| Přispěvatelé: | Evolutionary Biology (IBED, FNWI) |
| Rok vydání: | 2008 |
| Předmět: |
polar environment
glacier Aureobasidium Aureobasidium melanogenum rDNA Plant Science phylogeny translation elongation factor taxonomy Arctic Botany Sea ice Glacial period seawater geography LSU geography.geographical_feature_category biology Glacier Articles elongase biology.organism_classification Agricultural and Biological Sciences (miscellaneous) sea ice Aureobasidium pullulans black yeasts β-tubulin ITS Phyllosphere |
| Zdroj: | Studies in Mycology, 61(1), 21-38. Centraalbureau voor Schimmelculturen Studies in Mycology Studies in Mycology, 21-38. Westerdijk Fungal Biodiversity Institute ISSUE=1;STARTPAGE=21;ENDPAGE=38;ISSN=0166-0616;TITLE=Studies in Mycology |
| ISSN: | 0166-0616 |
| Popis: | Using media with low water activity, a large numbers of aureobasidium-like black yeasts were isolated from glacial and subglacial ice of three polythermal glaciers from the coastal Arctic environment of Kongsfjorden (Svalbard, Spitsbergen), as well as from adjacent sea water, sea ice and glacial meltwaters. To characterise the genetic variability of Aureobasidium pullulans strains originating from the Arctic and strains originating pan-globally, a multilocus molecular analysis was performed, through rDNA (internal transcribed spacers, partial 28 S rDNA), and partial introns and exons of genes encoding β-tubulin (TUB), translation elongation factor (EF1α) and elongase (ELO). Two globally ubiquitous varieties were distinguished: var. pullulans, occurring particularly in slightly osmotic substrates and in the phyllosphere; and var. melanogenum, mainly isolated from watery habitats. Both varieties were commonly isolated from the sampled Arctic habitats. However, some aureobasidium-like strains from subglacial ice from three different glaciers in Kongsfjorden (Svalbard, Spitsbergen), appeared to represent a new variety of A. pullulans. A strain from dolomitic marble in Namibia was found to belong to yet another variety. No molecular support has as yet been found for the previously described var. aubasidani. A partial elongase-encoding gene was successfully used as a phylogenetic marker at the (infra-)specific level.Taxonomic novelties: Aureobasidium pullulans var. subglaciale Zalar, de Hoog & Gunde-Cimerman, var. nov.; Aureobasidium pullulans var. namibiae Zalar, de Hoog & Gunde-Cimerman, var. nov. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|