Reproductive morphology and DNA sequences of the brown alga Platysiphon verticillatus support the new combination Platysiphon glacialis
Platysiphon verticillatus, a brown alga endemic to the Arctic, was described based on vegetative specimens collected at Inglefield Bay, West Greenland. The species is distinctive in having a lanceolate blade-like thallus terminated by a terete portion, both covered with hair-like assimilatory filame...
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ftunivrhodeislan:oai:digitalcommons.uri.edu:bio_facpubs-1475 2024-09-15T17:53:58+00:00 Reproductive morphology and DNA sequences of the brown alga Platysiphon verticillatus support the new combination Platysiphon glacialis Kawai, Hiroshi Hanyuda, Takeaki Yamagishi, Takahiro Kai, Atsushi Lane, Chris E. Mcdevit, Dan Küpper, Frithjof C. Saunders, Gary W. 2015-01-01T08:00:00Z https://digitalcommons.uri.edu/bio_facpubs/472 https://doi.org/10.1111/jpy.12331 unknown DigitalCommons@URI https://digitalcommons.uri.edu/bio_facpubs/472 doi:10.1111/jpy.12331 https://doi.org/10.1111/jpy.12331 Biological Sciences Faculty Publications Arctic Ocean Life history Molecular phylogeny Phaeophyceae Platysiphon glacialis comb. nov text 2015 ftunivrhodeislan https://doi.org/10.1111/jpy.12331 2024-08-21T00:09:34Z Platysiphon verticillatus, a brown alga endemic to the Arctic, was described based on vegetative specimens collected at Inglefield Bay, West Greenland. The species is distinctive in having a lanceolate blade-like thallus terminated by a terete portion, both covered with hair-like assimilatory filaments. Punctaria glacialis was described from Eastern Greenland, and the species differs from other Punctaria species in lacking hairs and plurilocular zoidangia. Unilocular zoidangia were reported, but instead of zoids being released they formed cell walls in situ developing the appearance of plurilocular zoidangia. However, the fate of the zoids, as well as the walled cells was not traced, and the life history of the alga has remained unclear. By comparing DNA sequences (cox1, cox3, and rDNA ITS2) of specimens morphologically referable to Platysiphon verticillatus and Punctaria glacialis collected at Baffin Island, as well as re-examining morphology and studying crude cultures, we concluded that they are the same taxonomic entity. Furthermore, their cox3 sequence and vegetative morphology agreed with those of the type specimen of Punctaria glacialis. Consequently, we propose Platysiphon glacialis comb. nov. The life cycle could not be completed in culture, but we hypothesize that in situ germination of the unizoids produces reduced gametophytes housed in peripheral tissue of erect sporophytic thalli. Text Arctic Ocean Baffin Island Baffin Greenland University of Rhode Island: DigitalCommons@URI Journal of Phycology 51 5 910 917 |
institution |
Open Polar |
collection |
University of Rhode Island: DigitalCommons@URI |
op_collection_id |
ftunivrhodeislan |
language |
unknown |
topic |
Arctic Ocean Life history Molecular phylogeny Phaeophyceae Platysiphon glacialis comb. nov |
spellingShingle |
Arctic Ocean Life history Molecular phylogeny Phaeophyceae Platysiphon glacialis comb. nov Kawai, Hiroshi Hanyuda, Takeaki Yamagishi, Takahiro Kai, Atsushi Lane, Chris E. Mcdevit, Dan Küpper, Frithjof C. Saunders, Gary W. Reproductive morphology and DNA sequences of the brown alga Platysiphon verticillatus support the new combination Platysiphon glacialis |
topic_facet |
Arctic Ocean Life history Molecular phylogeny Phaeophyceae Platysiphon glacialis comb. nov |
description |
Platysiphon verticillatus, a brown alga endemic to the Arctic, was described based on vegetative specimens collected at Inglefield Bay, West Greenland. The species is distinctive in having a lanceolate blade-like thallus terminated by a terete portion, both covered with hair-like assimilatory filaments. Punctaria glacialis was described from Eastern Greenland, and the species differs from other Punctaria species in lacking hairs and plurilocular zoidangia. Unilocular zoidangia were reported, but instead of zoids being released they formed cell walls in situ developing the appearance of plurilocular zoidangia. However, the fate of the zoids, as well as the walled cells was not traced, and the life history of the alga has remained unclear. By comparing DNA sequences (cox1, cox3, and rDNA ITS2) of specimens morphologically referable to Platysiphon verticillatus and Punctaria glacialis collected at Baffin Island, as well as re-examining morphology and studying crude cultures, we concluded that they are the same taxonomic entity. Furthermore, their cox3 sequence and vegetative morphology agreed with those of the type specimen of Punctaria glacialis. Consequently, we propose Platysiphon glacialis comb. nov. The life cycle could not be completed in culture, but we hypothesize that in situ germination of the unizoids produces reduced gametophytes housed in peripheral tissue of erect sporophytic thalli. |
format |
Text |
author |
Kawai, Hiroshi Hanyuda, Takeaki Yamagishi, Takahiro Kai, Atsushi Lane, Chris E. Mcdevit, Dan Küpper, Frithjof C. Saunders, Gary W. |
author_facet |
Kawai, Hiroshi Hanyuda, Takeaki Yamagishi, Takahiro Kai, Atsushi Lane, Chris E. Mcdevit, Dan Küpper, Frithjof C. Saunders, Gary W. |
author_sort |
Kawai, Hiroshi |
title |
Reproductive morphology and DNA sequences of the brown alga Platysiphon verticillatus support the new combination Platysiphon glacialis |
title_short |
Reproductive morphology and DNA sequences of the brown alga Platysiphon verticillatus support the new combination Platysiphon glacialis |
title_full |
Reproductive morphology and DNA sequences of the brown alga Platysiphon verticillatus support the new combination Platysiphon glacialis |
title_fullStr |
Reproductive morphology and DNA sequences of the brown alga Platysiphon verticillatus support the new combination Platysiphon glacialis |
title_full_unstemmed |
Reproductive morphology and DNA sequences of the brown alga Platysiphon verticillatus support the new combination Platysiphon glacialis |
title_sort |
reproductive morphology and dna sequences of the brown alga platysiphon verticillatus support the new combination platysiphon glacialis |
publisher |
DigitalCommons@URI |
publishDate |
2015 |
url |
https://digitalcommons.uri.edu/bio_facpubs/472 https://doi.org/10.1111/jpy.12331 |
genre |
Arctic Ocean Baffin Island Baffin Greenland |
genre_facet |
Arctic Ocean Baffin Island Baffin Greenland |
op_source |
Biological Sciences Faculty Publications |
op_relation |
https://digitalcommons.uri.edu/bio_facpubs/472 doi:10.1111/jpy.12331 https://doi.org/10.1111/jpy.12331 |
op_doi |
https://doi.org/10.1111/jpy.12331 |
container_title |
Journal of Phycology |
container_volume |
51 |
container_issue |
5 |
container_start_page |
910 |
op_container_end_page |
917 |
_version_ |
1810430119774257152 |