Cystobasidium alpinum sp. nov. and Rhodosporidiobolus oreadorum sp. nov. from european cold environments and arctic region

Benedetta Turchetti, Laura Selbmann, Nina Gunde-Cimerman, Pietro Buzzini, José Paulo Sampaio, Polona Zalar

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Over 80% of the Earth’s environments are permanently or periodically exposed to temperatures below 5°C. Cold habitats harbour a wide diversity of psychrophilic and psychrotolerant yeasts. During ecological studies of yeast communities carried out in cold ecosystem in the Italian Alps, Svalbard (Norway, Arctic region), and Portugal, 23 yeast strains that could not be assigned to any known fungal taxa were isolated. In particular, two of them were first identified as Rhodotorula sp., showing the highest degree of D1/D2 sequence identity with Cystobasidum laryngis accounted to only 97% with the type strain (C. laryngis CBS 2221). The other 21 strains, exhibiting identical D1/D2 sequences, had low identity (97%) with Rhodosporidiobolus lusitaniae and Rhodosporidiobolus colostri. Similarly, ITS sequences of the type strains of the most closely related species (93–94%). In a 2-genes multilocus D1/D2 and ITS ML phylogenetic tree, the studied strains pooled in two well separated and supported groups. In order to classify the new 23 isolates based on phylogenetic evidences, we propose the description of two novel species Cystobasidium alpinum sp. nov. and Rhodosporidiobolus oreadorum sp. nov.

Original languageEnglish
Article number9
JournalLife
Volume8
Issue number2
DOIs
Publication statusPublished - 1 Jun 2018

Fingerprint

Arctic Regions
Arctic regions
yeast
Yeast
Arctic region
Yeasts
Ecosystem
new species
Svalbard
Earth environment
Rhodotorula
phylogenetics
Portugal
yeasts
habitats
Norway
harbors
ecosystems
Ports and harbors
genes

Keywords

  • Alps
  • Arctic
  • Cold-adapted biodiversity
  • Cystobasidium alpinum sp. nov.
  • Psychrophilic yeasts
  • Rhodosporidiobolus oreadorum sp. nov.

Cite this

Turchetti, Benedetta ; Selbmann, Laura ; Gunde-Cimerman, Nina ; Buzzini, Pietro ; Sampaio, José Paulo ; Zalar, Polona. / Cystobasidium alpinum sp. nov. and Rhodosporidiobolus oreadorum sp. nov. from european cold environments and arctic region. In: Life. 2018 ; Vol. 8, No. 2.
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abstract = "Over 80{\%} of the Earth’s environments are permanently or periodically exposed to temperatures below 5°C. Cold habitats harbour a wide diversity of psychrophilic and psychrotolerant yeasts. During ecological studies of yeast communities carried out in cold ecosystem in the Italian Alps, Svalbard (Norway, Arctic region), and Portugal, 23 yeast strains that could not be assigned to any known fungal taxa were isolated. In particular, two of them were first identified as Rhodotorula sp., showing the highest degree of D1/D2 sequence identity with Cystobasidum laryngis accounted to only 97{\%} with the type strain (C. laryngis CBS 2221). The other 21 strains, exhibiting identical D1/D2 sequences, had low identity (97{\%}) with Rhodosporidiobolus lusitaniae and Rhodosporidiobolus colostri. Similarly, ITS sequences of the type strains of the most closely related species (93–94{\%}). In a 2-genes multilocus D1/D2 and ITS ML phylogenetic tree, the studied strains pooled in two well separated and supported groups. In order to classify the new 23 isolates based on phylogenetic evidences, we propose the description of two novel species Cystobasidium alpinum sp. nov. and Rhodosporidiobolus oreadorum sp. nov.",
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Cystobasidium alpinum sp. nov. and Rhodosporidiobolus oreadorum sp. nov. from european cold environments and arctic region. / Turchetti, Benedetta; Selbmann, Laura; Gunde-Cimerman, Nina; Buzzini, Pietro; Sampaio, José Paulo; Zalar, Polona.

In: Life, Vol. 8, No. 2, 9, 01.06.2018.

Research output: Contribution to journalArticle

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T1 - Cystobasidium alpinum sp. nov. and Rhodosporidiobolus oreadorum sp. nov. from european cold environments and arctic region

AU - Turchetti, Benedetta

AU - Selbmann, Laura

AU - Gunde-Cimerman, Nina

AU - Buzzini, Pietro

AU - Sampaio, José Paulo

AU - Zalar, Polona

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N2 - Over 80% of the Earth’s environments are permanently or periodically exposed to temperatures below 5°C. Cold habitats harbour a wide diversity of psychrophilic and psychrotolerant yeasts. During ecological studies of yeast communities carried out in cold ecosystem in the Italian Alps, Svalbard (Norway, Arctic region), and Portugal, 23 yeast strains that could not be assigned to any known fungal taxa were isolated. In particular, two of them were first identified as Rhodotorula sp., showing the highest degree of D1/D2 sequence identity with Cystobasidum laryngis accounted to only 97% with the type strain (C. laryngis CBS 2221). The other 21 strains, exhibiting identical D1/D2 sequences, had low identity (97%) with Rhodosporidiobolus lusitaniae and Rhodosporidiobolus colostri. Similarly, ITS sequences of the type strains of the most closely related species (93–94%). In a 2-genes multilocus D1/D2 and ITS ML phylogenetic tree, the studied strains pooled in two well separated and supported groups. In order to classify the new 23 isolates based on phylogenetic evidences, we propose the description of two novel species Cystobasidium alpinum sp. nov. and Rhodosporidiobolus oreadorum sp. nov.

AB - Over 80% of the Earth’s environments are permanently or periodically exposed to temperatures below 5°C. Cold habitats harbour a wide diversity of psychrophilic and psychrotolerant yeasts. During ecological studies of yeast communities carried out in cold ecosystem in the Italian Alps, Svalbard (Norway, Arctic region), and Portugal, 23 yeast strains that could not be assigned to any known fungal taxa were isolated. In particular, two of them were first identified as Rhodotorula sp., showing the highest degree of D1/D2 sequence identity with Cystobasidum laryngis accounted to only 97% with the type strain (C. laryngis CBS 2221). The other 21 strains, exhibiting identical D1/D2 sequences, had low identity (97%) with Rhodosporidiobolus lusitaniae and Rhodosporidiobolus colostri. Similarly, ITS sequences of the type strains of the most closely related species (93–94%). In a 2-genes multilocus D1/D2 and ITS ML phylogenetic tree, the studied strains pooled in two well separated and supported groups. In order to classify the new 23 isolates based on phylogenetic evidences, we propose the description of two novel species Cystobasidium alpinum sp. nov. and Rhodosporidiobolus oreadorum sp. nov.

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KW - Arctic

KW - Cold-adapted biodiversity

KW - Cystobasidium alpinum sp. nov.

KW - Psychrophilic yeasts

KW - Rhodosporidiobolus oreadorum sp. nov.

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DO - 10.3390/life8020009

M3 - Article

VL - 8

JO - Life (Basel, Switzerland)

JF - Life (Basel, Switzerland)

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M1 - 9

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