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Dictyosphaerium‐like morphotype in terrestrial algae: what is Xerochlorella (Trebouxiophyceae, Chlorophyta)?(1)

Several strains of terrestrial algae isolated from biological soil crusts in Germany and Ukraine were identified by morphological methods as the widely distributed species Dictyosphaerium minutum (=Dictyosphaerium chlorelloides). Investigation of the phylogeny showed their position unexpectedly outs...

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Autores principales: Mikhailyuk, Tatiana, Holzinger, Andreas, Tsarenko, Petro, Glaser, Karin, Demchenko, Eduard, Karsten, Ulf
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7317402/
https://www.ncbi.nlm.nih.gov/pubmed/31994728
http://dx.doi.org/10.1111/jpy.12974
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author Mikhailyuk, Tatiana
Holzinger, Andreas
Tsarenko, Petro
Glaser, Karin
Demchenko, Eduard
Karsten, Ulf
author_facet Mikhailyuk, Tatiana
Holzinger, Andreas
Tsarenko, Petro
Glaser, Karin
Demchenko, Eduard
Karsten, Ulf
author_sort Mikhailyuk, Tatiana
collection PubMed
description Several strains of terrestrial algae isolated from biological soil crusts in Germany and Ukraine were identified by morphological methods as the widely distributed species Dictyosphaerium minutum (=Dictyosphaerium chlorelloides). Investigation of the phylogeny showed their position unexpectedly outside of Chlorellaceae (Trebouxiophyceae) and distantly from Chlorella chlorelloides, to which this taxon was attributed after revision of the genus Chlorella based on an integrative approach. SSU rRNA phylogeny determined the position of our strains inside a clade recently described as a new genus of the cryptic alga Xerochlorella olmiae isolated from desert biological soil crusts in the United States. Investigation of the morphology of the authentic strain of X. olmiae showed Dictyosphaerium‐like morphology, as well as some other characters, common for our strains and morphospecies D. minutum. The latter alga was described as terrestrial and subsequently united with the earlier described aquatic representative D. chlorelloides because of their similar morphology. The revision of Chlorella mentioned above provided only one aquatic strain (D. chlorelloides), which determined its position in the genus. But terrestrial strains of the morphospecies were not investigated phylogenetically. Our study showed that the terrestrial D. minutum is not related to the morphologically similar D. chlorelloides (=Chlorella chlorelloides, Chlorellaceae), and instead represented a separate lineage in the Trebouxiophyceae, recently described as genus Xerochlorella. Therefore, revision of Xerochlorella is proposed, including nomenclatural combinations, epitypifications, and emendations of two species: X. minuta and X. dichotoma. New characters of the genus based on investigation of morphology and ultrastructure were determined.
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spelling pubmed-73174022020-06-30 Dictyosphaerium‐like morphotype in terrestrial algae: what is Xerochlorella (Trebouxiophyceae, Chlorophyta)?(1) Mikhailyuk, Tatiana Holzinger, Andreas Tsarenko, Petro Glaser, Karin Demchenko, Eduard Karsten, Ulf J Phycol Regular Articles Several strains of terrestrial algae isolated from biological soil crusts in Germany and Ukraine were identified by morphological methods as the widely distributed species Dictyosphaerium minutum (=Dictyosphaerium chlorelloides). Investigation of the phylogeny showed their position unexpectedly outside of Chlorellaceae (Trebouxiophyceae) and distantly from Chlorella chlorelloides, to which this taxon was attributed after revision of the genus Chlorella based on an integrative approach. SSU rRNA phylogeny determined the position of our strains inside a clade recently described as a new genus of the cryptic alga Xerochlorella olmiae isolated from desert biological soil crusts in the United States. Investigation of the morphology of the authentic strain of X. olmiae showed Dictyosphaerium‐like morphology, as well as some other characters, common for our strains and morphospecies D. minutum. The latter alga was described as terrestrial and subsequently united with the earlier described aquatic representative D. chlorelloides because of their similar morphology. The revision of Chlorella mentioned above provided only one aquatic strain (D. chlorelloides), which determined its position in the genus. But terrestrial strains of the morphospecies were not investigated phylogenetically. Our study showed that the terrestrial D. minutum is not related to the morphologically similar D. chlorelloides (=Chlorella chlorelloides, Chlorellaceae), and instead represented a separate lineage in the Trebouxiophyceae, recently described as genus Xerochlorella. Therefore, revision of Xerochlorella is proposed, including nomenclatural combinations, epitypifications, and emendations of two species: X. minuta and X. dichotoma. New characters of the genus based on investigation of morphology and ultrastructure were determined. John Wiley and Sons Inc. 2020-03-16 2020-06 /pmc/articles/PMC7317402/ /pubmed/31994728 http://dx.doi.org/10.1111/jpy.12974 Text en © 2020 The Authors. Journal of Phycology published by Wiley Periodicals, Inc. on behalf of Phycological Society of America This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Regular Articles
Mikhailyuk, Tatiana
Holzinger, Andreas
Tsarenko, Petro
Glaser, Karin
Demchenko, Eduard
Karsten, Ulf
Dictyosphaerium‐like morphotype in terrestrial algae: what is Xerochlorella (Trebouxiophyceae, Chlorophyta)?(1)
title Dictyosphaerium‐like morphotype in terrestrial algae: what is Xerochlorella (Trebouxiophyceae, Chlorophyta)?(1)
title_full Dictyosphaerium‐like morphotype in terrestrial algae: what is Xerochlorella (Trebouxiophyceae, Chlorophyta)?(1)
title_fullStr Dictyosphaerium‐like morphotype in terrestrial algae: what is Xerochlorella (Trebouxiophyceae, Chlorophyta)?(1)
title_full_unstemmed Dictyosphaerium‐like morphotype in terrestrial algae: what is Xerochlorella (Trebouxiophyceae, Chlorophyta)?(1)
title_short Dictyosphaerium‐like morphotype in terrestrial algae: what is Xerochlorella (Trebouxiophyceae, Chlorophyta)?(1)
title_sort dictyosphaerium‐like morphotype in terrestrial algae: what is xerochlorella (trebouxiophyceae, chlorophyta)?(1)
topic Regular Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7317402/
https://www.ncbi.nlm.nih.gov/pubmed/31994728
http://dx.doi.org/10.1111/jpy.12974
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