Pyramimonas australis sp. nov. (Prasinophyceae, Chlorophyta) from Antarctica: fine structure and molecular phylogeny
An undescribed marine Pyramimonas, P. australis Andreoli et Moro, sp. nov., forming a bloom in a hole of Terra Nova Bay (Ross Sea, Antarctica) sea ice, was collected, but could not be cultured. Consequently, the description of this new species is based on light and electron microscope observations o...
Published in: | European Journal of Phycology |
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Language: | English |
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CAMBRIDGE UNIV PRESS, 40 WEST 20TH ST, NEW YORK, NY 10011-4221 USA
2002
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Online Access: | http://hdl.handle.net/11577/2461273 https://doi.org/10.1017/S0967026201003493 |
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ftunivpadovairis:oai:www.research.unipd.it:11577/2461273 2024-02-11T09:55:50+01:00 Pyramimonas australis sp. nov. (Prasinophyceae, Chlorophyta) from Antarctica: fine structure and molecular phylogeny MORO, ISABELLA LA ROCCA, NICOLETTA DALLA VALLE, LUISA NEGRISOLO, ENRICO MASSIMILIANO ANDREOLI, CARLO MOSCHIN E. Moro, Isabella LA ROCCA, Nicoletta DALLA VALLE, Luisa Moschin, E. Negrisolo, ENRICO MASSIMILIANO Andreoli, Carlo 2002 STAMPA http://hdl.handle.net/11577/2461273 https://doi.org/10.1017/S0967026201003493 eng eng CAMBRIDGE UNIV PRESS, 40 WEST 20TH ST, NEW YORK, NY 10011-4221 USA info:eu-repo/semantics/altIdentifier/wos/WOS:000174629800010 volume:37 firstpage:103 lastpage:114 numberofpages:12 journal:EUROPEAN JOURNAL OF PHYCOLOGY http://hdl.handle.net/11577/2461273 doi:10.1017/S0967026201003493 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0036208103 Antarctica PCR Prasinophyceae phylogeny Pyramimonas australi rbcL gene Ross Sea SSU rDNA gene Terra Nova Bay ultrastructure info:eu-repo/semantics/article 2002 ftunivpadovairis https://doi.org/10.1017/S0967026201003493 2024-01-17T17:37:35Z An undescribed marine Pyramimonas, P. australis Andreoli et Moro, sp. nov., forming a bloom in a hole of Terra Nova Bay (Ross Sea, Antarctica) sea ice, was collected, but could not be cultured. Consequently, the description of this new species is based on light and electron microscope observations on samples that were fixed or stored at -80 degreesC, and its phylogenetic position inferred from nuclear-encoded small-subunit ribosomal DNA (SSU rDNA) and chloroplast-encoded rbcL gene sequences. This is the third Antarctic species described for this genus. The ultrastructure of the cell is consistent with species of the subgenus Trichocystis McFadden, but differs in that it has unique body and cyst scales. and a different encystment procedure. The outermost layer of body scales is formed by flat box scales with peripheral perforations oriented parallel to the four edges and with a further eight central perforations oriented perpendicular to the peripheral ones. Crown scales, which in many other species of the genus form the outermost layer over the entire cell body, were observed in this species in the flagellar pit over the box scales. The flagella are covered by a pentagonal underlayer of scales and by limuloid scales with two subsidiary spines, in addition to the central one. Encystment begins in the flagellate form resulting in a cyst with an irregular wall bearing spine scales. Ultrastructural and molecular data confirm that P. australis belongs to the subgenus Trichocystis. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Sea ice Padua Research Archive (IRIS - Università degli Studi di Padova) Antarctic Ross Sea Terra Nova Bay European Journal of Phycology 37 1 103 114 |
institution |
Open Polar |
collection |
Padua Research Archive (IRIS - Università degli Studi di Padova) |
op_collection_id |
ftunivpadovairis |
language |
English |
topic |
Antarctica PCR Prasinophyceae phylogeny Pyramimonas australi rbcL gene Ross Sea SSU rDNA gene Terra Nova Bay ultrastructure |
spellingShingle |
Antarctica PCR Prasinophyceae phylogeny Pyramimonas australi rbcL gene Ross Sea SSU rDNA gene Terra Nova Bay ultrastructure MORO, ISABELLA LA ROCCA, NICOLETTA DALLA VALLE, LUISA NEGRISOLO, ENRICO MASSIMILIANO ANDREOLI, CARLO MOSCHIN E. Pyramimonas australis sp. nov. (Prasinophyceae, Chlorophyta) from Antarctica: fine structure and molecular phylogeny |
topic_facet |
Antarctica PCR Prasinophyceae phylogeny Pyramimonas australi rbcL gene Ross Sea SSU rDNA gene Terra Nova Bay ultrastructure |
description |
An undescribed marine Pyramimonas, P. australis Andreoli et Moro, sp. nov., forming a bloom in a hole of Terra Nova Bay (Ross Sea, Antarctica) sea ice, was collected, but could not be cultured. Consequently, the description of this new species is based on light and electron microscope observations on samples that were fixed or stored at -80 degreesC, and its phylogenetic position inferred from nuclear-encoded small-subunit ribosomal DNA (SSU rDNA) and chloroplast-encoded rbcL gene sequences. This is the third Antarctic species described for this genus. The ultrastructure of the cell is consistent with species of the subgenus Trichocystis McFadden, but differs in that it has unique body and cyst scales. and a different encystment procedure. The outermost layer of body scales is formed by flat box scales with peripheral perforations oriented parallel to the four edges and with a further eight central perforations oriented perpendicular to the peripheral ones. Crown scales, which in many other species of the genus form the outermost layer over the entire cell body, were observed in this species in the flagellar pit over the box scales. The flagella are covered by a pentagonal underlayer of scales and by limuloid scales with two subsidiary spines, in addition to the central one. Encystment begins in the flagellate form resulting in a cyst with an irregular wall bearing spine scales. Ultrastructural and molecular data confirm that P. australis belongs to the subgenus Trichocystis. |
author2 |
Moro, Isabella LA ROCCA, Nicoletta DALLA VALLE, Luisa Moschin, E. Negrisolo, ENRICO MASSIMILIANO Andreoli, Carlo |
format |
Article in Journal/Newspaper |
author |
MORO, ISABELLA LA ROCCA, NICOLETTA DALLA VALLE, LUISA NEGRISOLO, ENRICO MASSIMILIANO ANDREOLI, CARLO MOSCHIN E. |
author_facet |
MORO, ISABELLA LA ROCCA, NICOLETTA DALLA VALLE, LUISA NEGRISOLO, ENRICO MASSIMILIANO ANDREOLI, CARLO MOSCHIN E. |
author_sort |
MORO, ISABELLA |
title |
Pyramimonas australis sp. nov. (Prasinophyceae, Chlorophyta) from Antarctica: fine structure and molecular phylogeny |
title_short |
Pyramimonas australis sp. nov. (Prasinophyceae, Chlorophyta) from Antarctica: fine structure and molecular phylogeny |
title_full |
Pyramimonas australis sp. nov. (Prasinophyceae, Chlorophyta) from Antarctica: fine structure and molecular phylogeny |
title_fullStr |
Pyramimonas australis sp. nov. (Prasinophyceae, Chlorophyta) from Antarctica: fine structure and molecular phylogeny |
title_full_unstemmed |
Pyramimonas australis sp. nov. (Prasinophyceae, Chlorophyta) from Antarctica: fine structure and molecular phylogeny |
title_sort |
pyramimonas australis sp. nov. (prasinophyceae, chlorophyta) from antarctica: fine structure and molecular phylogeny |
publisher |
CAMBRIDGE UNIV PRESS, 40 WEST 20TH ST, NEW YORK, NY 10011-4221 USA |
publishDate |
2002 |
url |
http://hdl.handle.net/11577/2461273 https://doi.org/10.1017/S0967026201003493 |
geographic |
Antarctic Ross Sea Terra Nova Bay |
geographic_facet |
Antarctic Ross Sea Terra Nova Bay |
genre |
Antarc* Antarctic Antarctica Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000174629800010 volume:37 firstpage:103 lastpage:114 numberofpages:12 journal:EUROPEAN JOURNAL OF PHYCOLOGY http://hdl.handle.net/11577/2461273 doi:10.1017/S0967026201003493 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0036208103 |
op_doi |
https://doi.org/10.1017/S0967026201003493 |
container_title |
European Journal of Phycology |
container_volume |
37 |
container_issue |
1 |
container_start_page |
103 |
op_container_end_page |
114 |
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1790599060820852736 |