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Please use this identifier to cite or link to this item: http://hdl.handle.net/10362/4066

Título: Dioszegia antarctica sp. nov. and Dioszegia cryoxerica sp. nov., psychrophilic basidiomycetous yeasts from polar desert soils in Antarctica
Autor: Fonseca, Álvaro
Connell, Laurie B.
Redman, Regina
Rodriguez, Russel
Barrett, Anne
Iszard, Melissa
Issue Date: 2010
Editora: Society for General Microbiology
Resumo: During a survey of the culturable soil fungal population in samples collected in Taylor Valley, South Victoria Land, Antarctica, 13 basidiomycetous yeast strains with orange-coloured colonies were isolated. Phylogenetic analyses of internal transcribed spacer (ITS) and partial LSU rRNA gene sequences showed that the strains belong to the Dioszegia clade of the Tremellales (Tremellomycetes, Agaricomycotina), but did not correspond to any of the hitherto recognized species. Two novel species, Dioszegia antarctica sp. nov. (type strain ANT-03-116T =CBS 10920T =PYCC 5970T) and Dioszegia cryoxerica sp. nov. (type strain ANT-03-071T =CBS 10919T =PYCC 5967T), are described to accommodate ten and three of these strains, respectively. Analysis of ITS sequences demonstrated intrastrain sequence heterogeneity in D. cryoxerica. The latter species is also notable for producing true hyphae with clamp connections and haustoria. However, no sexual structures were observed. The two novel species can be considered obligate psychrophiles, since they failed to grow above 20 °C and grew best between 10 and 15 °C.
Descrição: International Journal of Systematic and Evolutionary Microbiology, 60
URI: http://hdl.handle.net/10362/4066
ISSN: 1466-5026
Appears in Collections:FCT: DCV - Artigos em revista internacional com arbitragem científica

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