Cryptococcus festucosus sp. nov. a new hymenomycetous yeast in the Holtermannia clade

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Abstract:

Five yeast strains belonging to the genus Cryptococcus Vuillemin were isolated from steppe plants and turf collected in the Prioksko-terrasny biosphere reserve (Moscow region, Russia). Sequence analyses of the D1/D2 domains of the 26S rDNA and of the internal transcribed spacer region revealed that these yeast strains and strain CBS 8016 have almost identical sequences and belong to the Holtermannia clade of the Tremellomycetidae (Basidiomycota, Hymenomycetes). A novel species named Cryptococcus festucosus (type strain VKM Y-2930) is proposed to accommodate these strains. Physiological characteristics and mycocin sensitivity patterns distinguishing Cryptococcus festucosus from the other species of this clade are presented.Key words: mycocin sensitivity, rDNA sequencing, Cryptococcus, Holtermannia.

Cinq souches de levures appartenant au genre Cryptococcus Vuillemin ont été isolées de plantes et d'herbes de steppes de la réserve biosphère de Prioksko-terrasny (région de Moscou, Russie). Des analyses de séquences des domaines D1/D2 de l'ADNr 26S et de la région espaceur interne transcrite ont révélé que ces souches ainsi que la souche CBS 8016 avaient des séquences presque identiques et appartenaient à la clade de Holtermannia chez les Tremellomycetidae (Basidiomycètes, Hyménomycètes). Une nouvelle espèce nommée Cryptococcus festucosus (souche-type VKM Y-2930) est proposée afin de classifier ces souches. Nous faisons état de caractéristiques physiologiques et de profils de sensibilité aux mycocines de Cryptococcus festucosus distincts de ceux des autres espèces de cette clade.Mots clés : sensibilité aux mycocines, séquençage de l'ADNr, Cryptococcus, Holtermannia.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: December 1, 2004

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  • Published since 1954, this monthly journal contains new research in the field of microbiology including applied microbiology and biotechnology; microbial structure and function; fungi and other eucaryotic protists; infection and immunity; microbial ecology; physiology, metabolism and enzymology; and virology, genetics, and molecular biology. It also publishes review articles and notes on an occasional basis, contributed by recognized scientists worldwide.
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