Novel yeast taxa from the cold: description of Cryolevonia giraudoae sp. nov. and Camptobasidium gelus sp. nov.

García, Virginia de; Trochine, Andrea; Uetake, Jun; Bellora, Nicolás; Libkind, Diego

doi:10.1099/ijsem.0.004223

Cited by 5 publications

(8 citation statements)

References 27 publications

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“…arctica [22]; Phenoliferia – P. psychrophenolica , P. psychrophila, P. glacialis [23]; Glaciozyma—G. watsonii , G.martinii , G. antarctica , G. litorale [24, 25]; Camptobasidium – C. gelus [18]; and Cryolevonia—C. schafbergensis , C. giraudoae [17, 18].…”

Section: Full-textmentioning

confidence: 99%

“…watsonii , G.martinii , G. antarctica , G. litorale [24, 25]; Camptobasidium – C. gelus [18]; and Cryolevonia—C. schafbergensis , C. giraudoae [17, 18]. These studies exemplify the rich and still largely undiscovered diversity of glacial environments, especially among Microbotryomycetes (Pucciniomycotina).…”

Section: Full-textmentioning

confidence: 99%

“…Phylogenetic analyses of concatenated sequences of the ITS and the LSU placed representatives of the newly sampled strains into well-separated lineages of the Microbotryomycetes. Group 1 isolates were identified as Camptobasidum gelus , recently described based on one strain isolated from Antarctica and two from Greenland [ 18 ]. Phylogenetic sister group relatedness of group 2 isolates and C. gelus was highly supported (branch support BS=100 %).…”

Section: Phylogenymentioning

confidence: 99%

“…Accordingly, these species appeared to commonly occur in diverse glacial environments and different geographical locations. The genus Camptobasidium has a circumpolar distribution and it also occurs in Antarctica [ 18 ]. The genus Psychromyces has so far only been recorded in Arctic glacial environments, both in Greenland and Svalbard.…”

Section: Ecologymentioning

confidence: 99%

“…These studies reported considerable numbers of new taxa, for instance, in Bannozyma-B. arctica [19]; Mrakia -M. robertii, M. blollopsis, M. psychrophila [20,21]; Rhodotorula-R. arctica [22]; Phenoliferia -P. psychrophenolica, P. psychrophila, P. glacialis [23]; Glaciozyma-G. watsonii, G.martinii, G. antarctica, G. litorale [24,25]; Camptobasidium -C. gelus [18]; and Cryolevonia-C. schafbergensis, C. giraudoae [17,18]. These studies exemplify the rich and still largely undiscovered diversity of glacial environments, especially among Microbot-OPEN ACCESS ryomycetes (Pucciniomycotina).…”

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Greenland and Svalbard glaciers host unknown basidiomycetes: the yeast Camptobasidium arcticum sp. nov. and the dimorphic Psychromyces glacialis gen. and sp. nov.

Perini

Andrejašič

Gostinčar

et al. 2021

International Journal of Systematic and Evolutionary Microbiology

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Sampling campaigns in Greenland and Svalbard were executed to explore fungal diversity in cold habitats. Three very abundant groups of strains were discovered, consisting either of recently described or of yet-undescribed psychrophilic and oligotrophic yeasts and dimorphic fungi, accounting for around 50 % of the total cultivable diversity of basidiomycetes in our studies. The occurrence of these taxa has also been demonstrated by culture-independent methods. Based on phylogenetic analyses of ribosomal gene cluster sequences (D1/D2 domains of 28S (LSU), 18S (SSU), ITS with 5.8S rDNA) and sequences of protein-coding genes for elongation factor one alpha (TEF), cytochrome b (CYTB) and two subunits of the RNA polymerase II (RPB1 and RPB2) obtained from pure cultures, the isolated taxa presented in this study belong to Basidiomycota, subphylum Pucciniomycotina, class Microbotryomycetes, family Camptobasidiaceae. The dataset of the sequences supported the recognition of three species: Camptobasidium gelus, Camptobasidium arcticum sp. nov. (ex-type strain EXF-12713) and Psychromyces glacialis gen. and sp. nov. (ex-type strain EXF-13111). Camptobasidium gelus was found in the Svalbard and Greenland samples, while representatives of the here proposed new species, C. arcticum, were found only in the Greenland Ice Sheet. Psychromyces gen. nov. was erected for the dimorphic/filamentous isolates found in Svalbard and Greenland glacial environments. The taxon, for which the invalid name ‘Rhodotorula svalbardensis’ has been used, belongs to this genus. Based on ribosomal genes, Camptobasidium arcticum and Psychromyces glacialis are related, phylogenetically most closely related to the genera Glaciozyma and Cryolevonia. Seven genes phylogeny restricted to taxa with available sequences, supported the placement of Psychromyces to Camptobasidiaceae.

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Section: Full-textmentioning

confidence: 99%

Section: Full-textmentioning

confidence: 99%

Section: Phylogenymentioning

confidence: 99%

Section: Ecologymentioning

confidence: 99%

mentioning

confidence: 99%

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Greenland and Svalbard glaciers host unknown basidiomycetes: the yeast Camptobasidium arcticum sp. nov. and the dimorphic Psychromyces glacialis gen. and sp. nov.

Perini

Andrejašič

Gostinčar

et al. 2021

International Journal of Systematic and Evolutionary Microbiology

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Trends in yeast diversity discovery

et al. 2021

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Yeasts, usually defined as unicellular fungi, occur in various fungal lineages. Hence, they are not a taxonomic unit, but rather represent a fungal lifestyle shared by several unrelated lineages. Although the discovery of new yeast species occurs at an increasing speed, at the current rate it will likely take hundreds of years, if ever, before they will all be documented. Many parts of the earth, including many threatened habitats, remain unsampled for yeasts and many others are only superficially studied. Cold habitats, such as glaciers, are home to a specific community of cold-adapted yeasts, and, hence, there is some urgency to study such environments at locations where they might disappear soon due to anthropogenic climate change. The same is true for yeast communities in various natural forests that are impacted by deforestation and forest conversion. Many countries of the so-called Global South have not been sampled for yeasts, despite their economic promise. However, extensive research activity in Asia, especially China, has yielded many taxonomic novelties. Comparative genomics studies have demonstrated the presence of yeast species with a hybrid origin, many of them isolated from clinical or industrial environments. DNA-metabarcoding studies have demonstrated the prevalence, and in some cases dominance, of yeast species in soils and marine waters worldwide, including some surprising distributions, such as the unexpected and likely common presence of Malassezia yeasts in marine habitats.

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