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A Taxonomic Revision of the Wallemia sebi Species Complex

Wallemia sebi is a xerophilic food- and air-borne fungus. The name has been used for strains that prevail in cold, temperate and tropical climates. In this study, multi-locus phylogenetic analyses, using the internal transcribed spacer (ITS) regions, DNA replication licensing factor (MCM7), pre-rRNA...

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Autores principales: Jančič, Sašo, Nguyen, Hai D. T., Frisvad, Jens C., Zalar, Polona, Schroers, Hans-Josef, Seifert, Keith A., Gunde-Cimerman, Nina
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4446336/
https://www.ncbi.nlm.nih.gov/pubmed/26017053
http://dx.doi.org/10.1371/journal.pone.0125933
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author Jančič, Sašo
Nguyen, Hai D. T.
Frisvad, Jens C.
Zalar, Polona
Schroers, Hans-Josef
Seifert, Keith A.
Gunde-Cimerman, Nina
author_facet Jančič, Sašo
Nguyen, Hai D. T.
Frisvad, Jens C.
Zalar, Polona
Schroers, Hans-Josef
Seifert, Keith A.
Gunde-Cimerman, Nina
author_sort Jančič, Sašo
collection PubMed
description Wallemia sebi is a xerophilic food- and air-borne fungus. The name has been used for strains that prevail in cold, temperate and tropical climates. In this study, multi-locus phylogenetic analyses, using the internal transcribed spacer (ITS) regions, DNA replication licensing factor (MCM7), pre-rRNA processing protein (TSR1), RNA polymerase II largest subunit (RPB1), RNA polymerase II second largest subunit (RPB2) and a new marker 3´-phosphoadenosine-5´-phosphatase (HAL2), confirmed the previous hypothesis that W. sebi presents a complex of at least four species. Here, we confirm and apply the phylogenetic analyses based species hypotheses from a companion study to guide phenotypic assessment of W. sebi like strains from a wide range of substrates, climates and continents allowed the recognition of W. sebi sensu stricto and three new species described as W. mellicola, W. Canadensis, and W. tropicalis. The species differ in their conidial size, xerotolerance, halotolerance, chaotolerance, growth temperature regimes, extracellular enzyme activity profiles, and secondary metabolite patterns. A key to all currently accepted Wallemia species is provided that allow their identification on the basis of physiological, micromorphological and culture characters.
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spelling pubmed-44463362015-06-09 A Taxonomic Revision of the Wallemia sebi Species Complex Jančič, Sašo Nguyen, Hai D. T. Frisvad, Jens C. Zalar, Polona Schroers, Hans-Josef Seifert, Keith A. Gunde-Cimerman, Nina PLoS One Research Article Wallemia sebi is a xerophilic food- and air-borne fungus. The name has been used for strains that prevail in cold, temperate and tropical climates. In this study, multi-locus phylogenetic analyses, using the internal transcribed spacer (ITS) regions, DNA replication licensing factor (MCM7), pre-rRNA processing protein (TSR1), RNA polymerase II largest subunit (RPB1), RNA polymerase II second largest subunit (RPB2) and a new marker 3´-phosphoadenosine-5´-phosphatase (HAL2), confirmed the previous hypothesis that W. sebi presents a complex of at least four species. Here, we confirm and apply the phylogenetic analyses based species hypotheses from a companion study to guide phenotypic assessment of W. sebi like strains from a wide range of substrates, climates and continents allowed the recognition of W. sebi sensu stricto and three new species described as W. mellicola, W. Canadensis, and W. tropicalis. The species differ in their conidial size, xerotolerance, halotolerance, chaotolerance, growth temperature regimes, extracellular enzyme activity profiles, and secondary metabolite patterns. A key to all currently accepted Wallemia species is provided that allow their identification on the basis of physiological, micromorphological and culture characters. Public Library of Science 2015-05-27 /pmc/articles/PMC4446336/ /pubmed/26017053 http://dx.doi.org/10.1371/journal.pone.0125933 Text en © 2015 Jančič et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Jančič, Sašo
Nguyen, Hai D. T.
Frisvad, Jens C.
Zalar, Polona
Schroers, Hans-Josef
Seifert, Keith A.
Gunde-Cimerman, Nina
A Taxonomic Revision of the Wallemia sebi Species Complex
title A Taxonomic Revision of the Wallemia sebi Species Complex
title_full A Taxonomic Revision of the Wallemia sebi Species Complex
title_fullStr A Taxonomic Revision of the Wallemia sebi Species Complex
title_full_unstemmed A Taxonomic Revision of the Wallemia sebi Species Complex
title_short A Taxonomic Revision of the Wallemia sebi Species Complex
title_sort taxonomic revision of the wallemia sebi species complex
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4446336/
https://www.ncbi.nlm.nih.gov/pubmed/26017053
http://dx.doi.org/10.1371/journal.pone.0125933
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