Genetic relationships in bipolar species of the protist ciliate, Euplotes
Protists thrive in polar oceans, where they represent a major driving force for globally important biogeochemical cycles and a key food-web component. Their biogeography is frequently associated to bipolar patterns of distribution. Although conceptually well supported by apparently unrestricted migr...
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ftuncamerinoiris:oai:pubblicazioni.unicam.it:11581/387421 2024-04-14T08:04:27+00:00 Genetic relationships in bipolar species of the protist ciliate, Euplotes Di Giuseppe, Graziano Dini, Fernando VALLESI, Adriana LUPORINI, Pierangelo Di Giuseppe, Graziano Dini, Fernando Vallesi, Adriana Luporini, Pierangelo 2015 STAMPA http://hdl.handle.net/11581/387421 https://doi.org/10.1007/s10750-015-2274-5 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000362964400004 volume:761 issue:1 firstpage:71 lastpage:83 numberofpages:13 journal:HYDROBIOLOGIA http://hdl.handle.net/11581/387421 doi:10.1007/s10750-015-2274-5 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84944357074 https://doi.org/10.1007/s10750-015-2274-5 info:eu-repo/semantics/closedAccess info:eu-repo/semantics/article 2015 ftuncamerinoiris https://doi.org/10.1007/s10750-015-2274-5 2024-03-21T20:37:23Z Protists thrive in polar oceans, where they represent a major driving force for globally important biogeochemical cycles and a key food-web component. Their biogeography is frequently associated to bipolar patterns of distribution. Although conceptually well supported by apparently unrestricted migration rates, the experimental certification of these patterns copes with the protist paucity of morphological characters with taxonomic value and difficulties in applying conventional species concepts. We studied three marine species of the ciliate Euplotes, E. euryhalinus, E. nobilii, and E. petzi, for their bipolar distribution by comparing the SSU-rRNA gene sequences and mating interactions of Antarctic, Patagonian, and Arctic strains. Each species was analogously found not to carry significantly varied SSU-rRNA gene sequences, implying a common occurrence of trans-equatorial genetic mixing. However, mating analyses revealed significant interspecies differences. Scarce Antarctic 9 Arctic strain mating compatibility distinguished E. petzi from E. euryhalinus and E. nobilii, in which mating pairs between Antarctic and Arctic strains were successfully induced. Yet, E. nobilii was the only one of the two species to show cross-fertilizing and fertile mating pairs. Taking the biological concept of species as discriminatory, it was thus concluded that only E. nobilii warrants the definition of genuine bipolar species. Article in Journal/Newspaper Antarc* Antarctic Arctic CAMPUS Pubblicazioni Scientifiche Unicam (Università di Camerino) Arctic Antarctic Hydrobiologia 761 1 71 83 |
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Open Polar |
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CAMPUS Pubblicazioni Scientifiche Unicam (Università di Camerino) |
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ftuncamerinoiris |
language |
English |
description |
Protists thrive in polar oceans, where they represent a major driving force for globally important biogeochemical cycles and a key food-web component. Their biogeography is frequently associated to bipolar patterns of distribution. Although conceptually well supported by apparently unrestricted migration rates, the experimental certification of these patterns copes with the protist paucity of morphological characters with taxonomic value and difficulties in applying conventional species concepts. We studied three marine species of the ciliate Euplotes, E. euryhalinus, E. nobilii, and E. petzi, for their bipolar distribution by comparing the SSU-rRNA gene sequences and mating interactions of Antarctic, Patagonian, and Arctic strains. Each species was analogously found not to carry significantly varied SSU-rRNA gene sequences, implying a common occurrence of trans-equatorial genetic mixing. However, mating analyses revealed significant interspecies differences. Scarce Antarctic 9 Arctic strain mating compatibility distinguished E. petzi from E. euryhalinus and E. nobilii, in which mating pairs between Antarctic and Arctic strains were successfully induced. Yet, E. nobilii was the only one of the two species to show cross-fertilizing and fertile mating pairs. Taking the biological concept of species as discriminatory, it was thus concluded that only E. nobilii warrants the definition of genuine bipolar species. |
author2 |
Di Giuseppe, Graziano Dini, Fernando Vallesi, Adriana Luporini, Pierangelo |
format |
Article in Journal/Newspaper |
author |
Di Giuseppe, Graziano Dini, Fernando VALLESI, Adriana LUPORINI, Pierangelo |
spellingShingle |
Di Giuseppe, Graziano Dini, Fernando VALLESI, Adriana LUPORINI, Pierangelo Genetic relationships in bipolar species of the protist ciliate, Euplotes |
author_facet |
Di Giuseppe, Graziano Dini, Fernando VALLESI, Adriana LUPORINI, Pierangelo |
author_sort |
Di Giuseppe, Graziano |
title |
Genetic relationships in bipolar species of the protist ciliate, Euplotes |
title_short |
Genetic relationships in bipolar species of the protist ciliate, Euplotes |
title_full |
Genetic relationships in bipolar species of the protist ciliate, Euplotes |
title_fullStr |
Genetic relationships in bipolar species of the protist ciliate, Euplotes |
title_full_unstemmed |
Genetic relationships in bipolar species of the protist ciliate, Euplotes |
title_sort |
genetic relationships in bipolar species of the protist ciliate, euplotes |
publishDate |
2015 |
url |
http://hdl.handle.net/11581/387421 https://doi.org/10.1007/s10750-015-2274-5 |
geographic |
Arctic Antarctic |
geographic_facet |
Arctic Antarctic |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000362964400004 volume:761 issue:1 firstpage:71 lastpage:83 numberofpages:13 journal:HYDROBIOLOGIA http://hdl.handle.net/11581/387421 doi:10.1007/s10750-015-2274-5 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84944357074 https://doi.org/10.1007/s10750-015-2274-5 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1007/s10750-015-2274-5 |
container_title |
Hydrobiologia |
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761 |
container_issue |
1 |
container_start_page |
71 |
op_container_end_page |
83 |
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