Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus , and circumscription of Flechtneria rotunda gen. et sp. nov.
The family Scenedesmaceae is a taxonomically complicated group due to its simple morphology, high phenotypic plasticity, and the presence of cryptic taxa. Over the years several taxonomic revisions, based on molecular data, affected the family. Here, we describe a new scenedesmacean species from Ant...
Published in: | Journal of Phycology |
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Language: | English |
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2015
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Online Access: | https://biblio.ugent.be/publication/7244498 http://hdl.handle.net/1854/LU-7244498 https://doi.org/10.1111/jpy.12355 https://biblio.ugent.be/publication/7244498/file/8511967 |
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ftunivgent:oai:archive.ugent.be:7244498 2023-06-11T04:05:27+02:00 Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus , and circumscription of Flechtneria rotunda gen. et sp. nov. Sciuto, Katia Lewis, Louise A Verleyen, Elie Moro, Isabella La Rocca, Nicoletta 2015 application/pdf https://biblio.ugent.be/publication/7244498 http://hdl.handle.net/1854/LU-7244498 https://doi.org/10.1111/jpy.12355 https://biblio.ugent.be/publication/7244498/file/8511967 eng eng https://biblio.ugent.be/publication/7244498 http://hdl.handle.net/1854/LU-7244498 http://dx.doi.org/10.1111/jpy.12355 https://biblio.ugent.be/publication/7244498/file/8511967 No license (in copyright) info:eu-repo/semantics/restrictedAccess JOURNAL OF PHYCOLOGY ISSN: 0022-3646 Biology and Life Sciences 18S rDNA Chodatodesmus australis Flechtneria rotunda ITS2 rbcL Scenedesmaceae tufA COCCOID GREEN-ALGAE PHYLOGENETIC-RELATIONSHIPS MAXIMUM-LIKELIHOOD POLYPHASIC CHARACTERIZATION SEQUENCE COMPARISONS BARCODE MARKERS ALIGNMENT DATABASE MODEL journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2015 ftunivgent https://doi.org/10.1111/jpy.12355 2023-05-10T22:31:04Z The family Scenedesmaceae is a taxonomically complicated group due to its simple morphology, high phenotypic plasticity, and the presence of cryptic taxa. Over the years several taxonomic revisions, based on molecular data, affected the family. Here, we describe a new scenedesmacean species from Antarctica, Chodatodesmus australis, based on phylogenetic analyses of data from nuclear (ITS2 spacer, 18S rDNA), and plastid (rbcL, tufA) markers. Morphological (LM and SEM) and ultrastructural (TEM) observations, carried out both on the holotype of C. australis and on the generitype of Chodatodesmus, allow us to emend the original generic description of this genus. Our molecular and phylogenetic data also reveal the existence of a new monotypic genus, Flechtneria, inside the family Scenedesmaceae and lead to the taxonomic reassignment of some microalgal strains available in International Culture Collections to new taxa. Of the considered genomic regions, the tufA gene was the easiest to amplify and sequence and it showed the highest phylogenetic signal, even if the number of sequences already available for this marker in the public databases was considerably lower than for the other chosen loci. The rbcL gene also provided good phylogenetic signal, but its amplification and sequencing were generally more problematic. The nuclear markers gave lower phylogenetic signals, but the 18S rDNA allowed distinction at the genus level and the ITS2 spacer had the advantage that secondary structures could be considered in the analyses. The use of more than one molecular locus is suggested to obtain reliable results in the characterization of scenedesmacean strains. Article in Journal/Newspaper Antarc* Antarctica Ghent University Academic Bibliography Rotunda ENVELOPE(161.567,161.567,-78.017,-78.017) Journal of Phycology 51 6 1172 1188 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Biology and Life Sciences 18S rDNA Chodatodesmus australis Flechtneria rotunda ITS2 rbcL Scenedesmaceae tufA COCCOID GREEN-ALGAE PHYLOGENETIC-RELATIONSHIPS MAXIMUM-LIKELIHOOD POLYPHASIC CHARACTERIZATION SEQUENCE COMPARISONS BARCODE MARKERS ALIGNMENT DATABASE MODEL |
spellingShingle |
Biology and Life Sciences 18S rDNA Chodatodesmus australis Flechtneria rotunda ITS2 rbcL Scenedesmaceae tufA COCCOID GREEN-ALGAE PHYLOGENETIC-RELATIONSHIPS MAXIMUM-LIKELIHOOD POLYPHASIC CHARACTERIZATION SEQUENCE COMPARISONS BARCODE MARKERS ALIGNMENT DATABASE MODEL Sciuto, Katia Lewis, Louise A Verleyen, Elie Moro, Isabella La Rocca, Nicoletta Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus , and circumscription of Flechtneria rotunda gen. et sp. nov. |
topic_facet |
Biology and Life Sciences 18S rDNA Chodatodesmus australis Flechtneria rotunda ITS2 rbcL Scenedesmaceae tufA COCCOID GREEN-ALGAE PHYLOGENETIC-RELATIONSHIPS MAXIMUM-LIKELIHOOD POLYPHASIC CHARACTERIZATION SEQUENCE COMPARISONS BARCODE MARKERS ALIGNMENT DATABASE MODEL |
description |
The family Scenedesmaceae is a taxonomically complicated group due to its simple morphology, high phenotypic plasticity, and the presence of cryptic taxa. Over the years several taxonomic revisions, based on molecular data, affected the family. Here, we describe a new scenedesmacean species from Antarctica, Chodatodesmus australis, based on phylogenetic analyses of data from nuclear (ITS2 spacer, 18S rDNA), and plastid (rbcL, tufA) markers. Morphological (LM and SEM) and ultrastructural (TEM) observations, carried out both on the holotype of C. australis and on the generitype of Chodatodesmus, allow us to emend the original generic description of this genus. Our molecular and phylogenetic data also reveal the existence of a new monotypic genus, Flechtneria, inside the family Scenedesmaceae and lead to the taxonomic reassignment of some microalgal strains available in International Culture Collections to new taxa. Of the considered genomic regions, the tufA gene was the easiest to amplify and sequence and it showed the highest phylogenetic signal, even if the number of sequences already available for this marker in the public databases was considerably lower than for the other chosen loci. The rbcL gene also provided good phylogenetic signal, but its amplification and sequencing were generally more problematic. The nuclear markers gave lower phylogenetic signals, but the 18S rDNA allowed distinction at the genus level and the ITS2 spacer had the advantage that secondary structures could be considered in the analyses. The use of more than one molecular locus is suggested to obtain reliable results in the characterization of scenedesmacean strains. |
format |
Article in Journal/Newspaper |
author |
Sciuto, Katia Lewis, Louise A Verleyen, Elie Moro, Isabella La Rocca, Nicoletta |
author_facet |
Sciuto, Katia Lewis, Louise A Verleyen, Elie Moro, Isabella La Rocca, Nicoletta |
author_sort |
Sciuto, Katia |
title |
Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus , and circumscription of Flechtneria rotunda gen. et sp. nov. |
title_short |
Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus , and circumscription of Flechtneria rotunda gen. et sp. nov. |
title_full |
Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus , and circumscription of Flechtneria rotunda gen. et sp. nov. |
title_fullStr |
Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus , and circumscription of Flechtneria rotunda gen. et sp. nov. |
title_full_unstemmed |
Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus , and circumscription of Flechtneria rotunda gen. et sp. nov. |
title_sort |
chodatodesmus australis sp. nov. (scenedesmaceae, chlorophyta) from antarctica, with the emended description of the genus chodatodesmus , and circumscription of flechtneria rotunda gen. et sp. nov. |
publishDate |
2015 |
url |
https://biblio.ugent.be/publication/7244498 http://hdl.handle.net/1854/LU-7244498 https://doi.org/10.1111/jpy.12355 https://biblio.ugent.be/publication/7244498/file/8511967 |
long_lat |
ENVELOPE(161.567,161.567,-78.017,-78.017) |
geographic |
Rotunda |
geographic_facet |
Rotunda |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
JOURNAL OF PHYCOLOGY ISSN: 0022-3646 |
op_relation |
https://biblio.ugent.be/publication/7244498 http://hdl.handle.net/1854/LU-7244498 http://dx.doi.org/10.1111/jpy.12355 https://biblio.ugent.be/publication/7244498/file/8511967 |
op_rights |
No license (in copyright) info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/jpy.12355 |
container_title |
Journal of Phycology |
container_volume |
51 |
container_issue |
6 |
container_start_page |
1172 |
op_container_end_page |
1188 |
_version_ |
1768375694305263616 |