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Updating algal evolutionary relationships through plastid genome sequencing: did alveolate plastids emerge through endosymbiosis of an ochrophyte?

Algae with secondary plastids of a red algal origin, such as ochrophytes (photosynthetic stramenopiles), are diverse and ecologically important, yet their evolutionary history remains controversial. We sequenced plastid genomes of two ochrophytes, Ochromonas sp. CCMP1393 (Chrysophyceae) and Trachydi...

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Autores principales: Ševčíková, Tereza, Horák, Aleš, Klimeš, Vladimír, Zbránková, Veronika, Demir-Hilton, Elif, Sudek, Sebastian, Jenkins, Jerry, Schmutz, Jeremy, Přibyl, Pavel, Fousek, Jan, Vlček, Čestmír, Lang, B. Franz, Oborník, Miroslav, Worden, Alexandra Z., Eliáš, Marek
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4603697/
https://www.ncbi.nlm.nih.gov/pubmed/26017773
http://dx.doi.org/10.1038/srep10134
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author Ševčíková, Tereza
Horák, Aleš
Klimeš, Vladimír
Zbránková, Veronika
Demir-Hilton, Elif
Sudek, Sebastian
Jenkins, Jerry
Schmutz, Jeremy
Přibyl, Pavel
Fousek, Jan
Vlček, Čestmír
Lang, B. Franz
Oborník, Miroslav
Worden, Alexandra Z.
Eliáš, Marek
author_facet Ševčíková, Tereza
Horák, Aleš
Klimeš, Vladimír
Zbránková, Veronika
Demir-Hilton, Elif
Sudek, Sebastian
Jenkins, Jerry
Schmutz, Jeremy
Přibyl, Pavel
Fousek, Jan
Vlček, Čestmír
Lang, B. Franz
Oborník, Miroslav
Worden, Alexandra Z.
Eliáš, Marek
author_sort Ševčíková, Tereza
collection PubMed
description Algae with secondary plastids of a red algal origin, such as ochrophytes (photosynthetic stramenopiles), are diverse and ecologically important, yet their evolutionary history remains controversial. We sequenced plastid genomes of two ochrophytes, Ochromonas sp. CCMP1393 (Chrysophyceae) and Trachydiscus minutus (Eustigmatophyceae). A shared split of the clpC gene as well as phylogenomic analyses of concatenated protein sequences demonstrated that chrysophytes and eustigmatophytes form a clade, the Limnista, exhibiting an unexpectedly elevated rate of plastid gene evolution. Our analyses also indicate that the root of the ochrophyte phylogeny falls between the recently redefined Khakista and Phaeista assemblages. Taking advantage of the expanded sampling of plastid genome sequences, we revisited the phylogenetic position of the plastid of Vitrella brassicaformis, a member of Alveolata with the least derived plastid genome known for the whole group. The results varied depending on the dataset and phylogenetic method employed, but suggested that the Vitrella plastids emerged from a deep ochrophyte lineage rather than being derived vertically from a hypothetical plastid-bearing common ancestor of alveolates and stramenopiles. Thus, we hypothesize that the plastid in Vitrella, and potentially in other alveolates, may have been acquired by an endosymbiosis of an early ochrophyte.
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spelling pubmed-46036972015-10-23 Updating algal evolutionary relationships through plastid genome sequencing: did alveolate plastids emerge through endosymbiosis of an ochrophyte? Ševčíková, Tereza Horák, Aleš Klimeš, Vladimír Zbránková, Veronika Demir-Hilton, Elif Sudek, Sebastian Jenkins, Jerry Schmutz, Jeremy Přibyl, Pavel Fousek, Jan Vlček, Čestmír Lang, B. Franz Oborník, Miroslav Worden, Alexandra Z. Eliáš, Marek Sci Rep Article Algae with secondary plastids of a red algal origin, such as ochrophytes (photosynthetic stramenopiles), are diverse and ecologically important, yet their evolutionary history remains controversial. We sequenced plastid genomes of two ochrophytes, Ochromonas sp. CCMP1393 (Chrysophyceae) and Trachydiscus minutus (Eustigmatophyceae). A shared split of the clpC gene as well as phylogenomic analyses of concatenated protein sequences demonstrated that chrysophytes and eustigmatophytes form a clade, the Limnista, exhibiting an unexpectedly elevated rate of plastid gene evolution. Our analyses also indicate that the root of the ochrophyte phylogeny falls between the recently redefined Khakista and Phaeista assemblages. Taking advantage of the expanded sampling of plastid genome sequences, we revisited the phylogenetic position of the plastid of Vitrella brassicaformis, a member of Alveolata with the least derived plastid genome known for the whole group. The results varied depending on the dataset and phylogenetic method employed, but suggested that the Vitrella plastids emerged from a deep ochrophyte lineage rather than being derived vertically from a hypothetical plastid-bearing common ancestor of alveolates and stramenopiles. Thus, we hypothesize that the plastid in Vitrella, and potentially in other alveolates, may have been acquired by an endosymbiosis of an early ochrophyte. Nature Publishing Group 2015-05-28 /pmc/articles/PMC4603697/ /pubmed/26017773 http://dx.doi.org/10.1038/srep10134 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Ševčíková, Tereza
Horák, Aleš
Klimeš, Vladimír
Zbránková, Veronika
Demir-Hilton, Elif
Sudek, Sebastian
Jenkins, Jerry
Schmutz, Jeremy
Přibyl, Pavel
Fousek, Jan
Vlček, Čestmír
Lang, B. Franz
Oborník, Miroslav
Worden, Alexandra Z.
Eliáš, Marek
Updating algal evolutionary relationships through plastid genome sequencing: did alveolate plastids emerge through endosymbiosis of an ochrophyte?
title Updating algal evolutionary relationships through plastid genome sequencing: did alveolate plastids emerge through endosymbiosis of an ochrophyte?
title_full Updating algal evolutionary relationships through plastid genome sequencing: did alveolate plastids emerge through endosymbiosis of an ochrophyte?
title_fullStr Updating algal evolutionary relationships through plastid genome sequencing: did alveolate plastids emerge through endosymbiosis of an ochrophyte?
title_full_unstemmed Updating algal evolutionary relationships through plastid genome sequencing: did alveolate plastids emerge through endosymbiosis of an ochrophyte?
title_short Updating algal evolutionary relationships through plastid genome sequencing: did alveolate plastids emerge through endosymbiosis of an ochrophyte?
title_sort updating algal evolutionary relationships through plastid genome sequencing: did alveolate plastids emerge through endosymbiosis of an ochrophyte?
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4603697/
https://www.ncbi.nlm.nih.gov/pubmed/26017773
http://dx.doi.org/10.1038/srep10134
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