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Cystobasidium alpinum sp. nov. and Rhodosporidiobolus oreadorum sp. nov. from European Cold Environments and Arctic Region

1
Department of Agricultural, Food and Environmental Sciences & Industrial Yeasts Collection DBVPG, University of Perugia, 06121 Perugia, Italy
2
Department of Ecological and Biological Sciences, University of Tuscia, 01100 Viterbo, Italy
3
Italian National Antarctic Museum, Section of Mycology, 16128 Genoa, Italy
4
Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia
5
UCIBIO-REQUIMTE, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
*
Author to whom correspondence should be addressed.
Received: 6 April 2018 / Revised: 30 April 2018 / Accepted: 4 May 2018 / Published: 5 May 2018
(This article belongs to the Special Issue Fungi from Extreme Environments)
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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. View Full-Text
Keywords: Cystobasidium alpinum sp. nov.; Rhodosporidiobolus oreadorum sp. nov.; psychrophilic yeasts; Arctic; Alps; cold-adapted biodiversity Cystobasidium alpinum sp. nov.; Rhodosporidiobolus oreadorum sp. nov.; psychrophilic yeasts; Arctic; Alps; cold-adapted biodiversity
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Turchetti, B.; Selbmann, L.; Gunde-Cimerman, N.; Buzzini, P.; Sampaio, J.P.; Zalar, P. Cystobasidium alpinum sp. nov. and Rhodosporidiobolus oreadorum sp. nov. from European Cold Environments and Arctic Region. Life 2018, 8, 9.

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