Pelagic photosymbiosis: rDNA assessment of diversity and evolution of dinoilagellate symbionts and planktonic foraminiferal hosts
We present large subunit (LSU) and internal transcribed spacer (ITS) rDNA based phylogenies of symbiotic dinoflagellates retrieved from single-cell planktonic foraminifera collected around the world. All modern foraminiferal species involved in such symbiosis are included in our analyses. The pelagi...
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ftarchimer:oai:archimer.ifremer.fr:49440 2023-05-15T18:00:39+02:00 Pelagic photosymbiosis: rDNA assessment of diversity and evolution of dinoilagellate symbionts and planktonic foraminiferal hosts Shaked, Yonathan De Vargas, Colomban 2006 application/pdf https://archimer.ifremer.fr/doc/00383/49440/49907.pdf https://doi.org/10.3354/meps325059 https://archimer.ifremer.fr/doc/00383/49440/ eng eng Inter-research https://archimer.ifremer.fr/doc/00383/49440/49907.pdf doi:10.3354/meps325059 https://archimer.ifremer.fr/doc/00383/49440/ Inter-Research 2006 · www.int-res.com info:eu-repo/semantics/openAccess restricted use Marine Ecology Progress Series (0171-8630) (Inter-research), 2006 , Vol. 325 , P. 59-71 symbiosis planktonic foraminifer dinoflagellate open ocean suessiales text Publication info:eu-repo/semantics/article 2006 ftarchimer https://doi.org/10.3354/meps325059 2021-09-23T20:29:28Z We present large subunit (LSU) and internal transcribed spacer (ITS) rDNA based phylogenies of symbiotic dinoflagellates retrieved from single-cell planktonic foraminifera collected around the world. All modern foraminiferal species involved in such symbiosis are included in our analyses. The pelagic symbiotic dinoflagellates form a monophyletic group sister to the Symbiodinium species complex found in coastal-benthic environments. The pelagic symbionts are descendants of free-living species and, together with the coastal-benthic Symbiodinium spp., they originated from the early Mesozoic suessiacean family represented by the extant Polarella glacialis. Out of hundreds of single planktonic foraminifera examined, 21 unique pelagic symbiont ribotypes were recognized, which could be divided into 2 main clades and 4 genetic subgroups, We observed an absence of specificity between the symbiont genetic types and the host genetic and morphological species. A few foraminifera even harbored dinoflagellates of more than one genetic subgroup. This genetic flexibility may be constrained by the fast life cycles of pelagic single-cell hosts, which acquire symbionts de novo from the ambient water at each generation. The obligatory transitional free-living stage of pelagic symbionts prior to acquisition by foraminiferal hosts may also explain their significantly lower rates of DNA substitution in comparison to their coastal-benthic relatives. We propose that the open ocean ecosystem has maintained photosymbioses involving a relatively low genetic diversity, but an extreme flexibility in the relationships between both partners, which also preserved their ancestral ability for independent life. Article in Journal/Newspaper Planktonic foraminifera Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Marine Ecology Progress Series 325 59 71 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
symbiosis planktonic foraminifer dinoflagellate open ocean suessiales |
spellingShingle |
symbiosis planktonic foraminifer dinoflagellate open ocean suessiales Shaked, Yonathan De Vargas, Colomban Pelagic photosymbiosis: rDNA assessment of diversity and evolution of dinoilagellate symbionts and planktonic foraminiferal hosts |
topic_facet |
symbiosis planktonic foraminifer dinoflagellate open ocean suessiales |
description |
We present large subunit (LSU) and internal transcribed spacer (ITS) rDNA based phylogenies of symbiotic dinoflagellates retrieved from single-cell planktonic foraminifera collected around the world. All modern foraminiferal species involved in such symbiosis are included in our analyses. The pelagic symbiotic dinoflagellates form a monophyletic group sister to the Symbiodinium species complex found in coastal-benthic environments. The pelagic symbionts are descendants of free-living species and, together with the coastal-benthic Symbiodinium spp., they originated from the early Mesozoic suessiacean family represented by the extant Polarella glacialis. Out of hundreds of single planktonic foraminifera examined, 21 unique pelagic symbiont ribotypes were recognized, which could be divided into 2 main clades and 4 genetic subgroups, We observed an absence of specificity between the symbiont genetic types and the host genetic and morphological species. A few foraminifera even harbored dinoflagellates of more than one genetic subgroup. This genetic flexibility may be constrained by the fast life cycles of pelagic single-cell hosts, which acquire symbionts de novo from the ambient water at each generation. The obligatory transitional free-living stage of pelagic symbionts prior to acquisition by foraminiferal hosts may also explain their significantly lower rates of DNA substitution in comparison to their coastal-benthic relatives. We propose that the open ocean ecosystem has maintained photosymbioses involving a relatively low genetic diversity, but an extreme flexibility in the relationships between both partners, which also preserved their ancestral ability for independent life. |
format |
Article in Journal/Newspaper |
author |
Shaked, Yonathan De Vargas, Colomban |
author_facet |
Shaked, Yonathan De Vargas, Colomban |
author_sort |
Shaked, Yonathan |
title |
Pelagic photosymbiosis: rDNA assessment of diversity and evolution of dinoilagellate symbionts and planktonic foraminiferal hosts |
title_short |
Pelagic photosymbiosis: rDNA assessment of diversity and evolution of dinoilagellate symbionts and planktonic foraminiferal hosts |
title_full |
Pelagic photosymbiosis: rDNA assessment of diversity and evolution of dinoilagellate symbionts and planktonic foraminiferal hosts |
title_fullStr |
Pelagic photosymbiosis: rDNA assessment of diversity and evolution of dinoilagellate symbionts and planktonic foraminiferal hosts |
title_full_unstemmed |
Pelagic photosymbiosis: rDNA assessment of diversity and evolution of dinoilagellate symbionts and planktonic foraminiferal hosts |
title_sort |
pelagic photosymbiosis: rdna assessment of diversity and evolution of dinoilagellate symbionts and planktonic foraminiferal hosts |
publisher |
Inter-research |
publishDate |
2006 |
url |
https://archimer.ifremer.fr/doc/00383/49440/49907.pdf https://doi.org/10.3354/meps325059 https://archimer.ifremer.fr/doc/00383/49440/ |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Marine Ecology Progress Series (0171-8630) (Inter-research), 2006 , Vol. 325 , P. 59-71 |
op_relation |
https://archimer.ifremer.fr/doc/00383/49440/49907.pdf doi:10.3354/meps325059 https://archimer.ifremer.fr/doc/00383/49440/ |
op_rights |
Inter-Research 2006 · www.int-res.com info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.3354/meps325059 |
container_title |
Marine Ecology Progress Series |
container_volume |
325 |
container_start_page |
59 |
op_container_end_page |
71 |
_version_ |
1766169840841654272 |