Diversification, Evolution and Sub-Functionalization of 70kDa Heat-Shock Proteins in Two Sister Species of Antarctic Krill: Differences in Thermal Habitats, Responses and Implications under Climate Change
International audience BackgroundA comparative thermal tolerance study was undertaken on two sister species of Euphausiids (Antarctic krills) Euphausia superba and Euphausia crystallorophias. Both are essential components of the Southern Ocean ecosystem, but occupy distinct environmental geographica...
Published in: | PLOS ONE |
---|---|
Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2015
|
Subjects: | |
Online Access: | https://hal.sorbonne-universite.fr/hal-01142647 https://hal.sorbonne-universite.fr/hal-01142647/document https://hal.sorbonne-universite.fr/hal-01142647/file/Cascella_2015_Diversification,.pdf https://doi.org/10.1371/journal.pone.0121642 |
id |
ftnormandieuniv:oai:HAL:hal-01142647v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Normandie Université: HAL |
op_collection_id |
ftnormandieuniv |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Cascella, Kévin Jollivet, Didier Papot, Claire Léger, Nelly Corre, Erwan Ravaux, Juliette Clark, Melody S. Toullec, Jean-Yves Diversification, Evolution and Sub-Functionalization of 70kDa Heat-Shock Proteins in Two Sister Species of Antarctic Krill: Differences in Thermal Habitats, Responses and Implications under Climate Change |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience BackgroundA comparative thermal tolerance study was undertaken on two sister species of Euphausiids (Antarctic krills) Euphausia superba and Euphausia crystallorophias. Both are essential components of the Southern Ocean ecosystem, but occupy distinct environmental geographical locations with slightly different temperature regimes. They therefore provide a useful model system for the investigation of adaptations to thermal tolerance.Methodology/Principal FindingInitial CTmax studies showed that E. superba was slightly more thermotolerant than E. crystallorophias. Five Hsp70 mRNAs were characterized from the RNAseq data of both species and subsequent expression kinetics studies revealed notable differences in induction of each of the 5 orthologues between the two species, with E. crystallorophias reacting more rapidly than E. superba. Furthermore, analyses conducted to estimate the evolutionary rates and selection strengths acting on each gene tended to support the hypothesis that diversifying selection has contributed to the diversification of this gene family, and led to the selective relaxation on the inducible C form with its possible loss of function in the two krill species.ConclusionsThe sensitivity of the epipelagic species E. crystallorophias to temperature variations and/or its adaptation to cold is enhanced when compared with its sister species, E. superba. These results indicate that ice krill could be the first of the two species to be impacted by the warming of coastal waters of the Austral ocean in the coming years due to climate change. |
author2 |
Adaptation et Biologie des Invertébrés en Conditions Extrêmes (ABICE) Adaptation et diversité en milieu marin (AD2M) Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 (Evo-Eco-Paléo (EEP)) Université de Lille-Centre National de la Recherche Scientifique (CNRS) Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) Phophorylation de protéines et Pathologies Humaines (P3H) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) |
format |
Article in Journal/Newspaper |
author |
Cascella, Kévin Jollivet, Didier Papot, Claire Léger, Nelly Corre, Erwan Ravaux, Juliette Clark, Melody S. Toullec, Jean-Yves |
author_facet |
Cascella, Kévin Jollivet, Didier Papot, Claire Léger, Nelly Corre, Erwan Ravaux, Juliette Clark, Melody S. Toullec, Jean-Yves |
author_sort |
Cascella, Kévin |
title |
Diversification, Evolution and Sub-Functionalization of 70kDa Heat-Shock Proteins in Two Sister Species of Antarctic Krill: Differences in Thermal Habitats, Responses and Implications under Climate Change |
title_short |
Diversification, Evolution and Sub-Functionalization of 70kDa Heat-Shock Proteins in Two Sister Species of Antarctic Krill: Differences in Thermal Habitats, Responses and Implications under Climate Change |
title_full |
Diversification, Evolution and Sub-Functionalization of 70kDa Heat-Shock Proteins in Two Sister Species of Antarctic Krill: Differences in Thermal Habitats, Responses and Implications under Climate Change |
title_fullStr |
Diversification, Evolution and Sub-Functionalization of 70kDa Heat-Shock Proteins in Two Sister Species of Antarctic Krill: Differences in Thermal Habitats, Responses and Implications under Climate Change |
title_full_unstemmed |
Diversification, Evolution and Sub-Functionalization of 70kDa Heat-Shock Proteins in Two Sister Species of Antarctic Krill: Differences in Thermal Habitats, Responses and Implications under Climate Change |
title_sort |
diversification, evolution and sub-functionalization of 70kda heat-shock proteins in two sister species of antarctic krill: differences in thermal habitats, responses and implications under climate change |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.sorbonne-universite.fr/hal-01142647 https://hal.sorbonne-universite.fr/hal-01142647/document https://hal.sorbonne-universite.fr/hal-01142647/file/Cascella_2015_Diversification,.pdf https://doi.org/10.1371/journal.pone.0121642 |
long_lat |
ENVELOPE(90.000,90.000,-60.000,-60.000) |
geographic |
Antarctic Austral Austral Ocean Southern Ocean |
geographic_facet |
Antarctic Austral Austral Ocean Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Austral Ocean Euphausia superba Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Austral Ocean Euphausia superba Southern Ocean |
op_source |
ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.sorbonne-universite.fr/hal-01142647 PLoS ONE, 2015, 10 (4), pp.e0121642. ⟨10.1371/journal.pone.0121642⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0121642 hal-01142647 https://hal.sorbonne-universite.fr/hal-01142647 https://hal.sorbonne-universite.fr/hal-01142647/document https://hal.sorbonne-universite.fr/hal-01142647/file/Cascella_2015_Diversification,.pdf doi:10.1371/journal.pone.0121642 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0121642 |
container_title |
PLOS ONE |
container_volume |
10 |
container_issue |
4 |
container_start_page |
e0121642 |
_version_ |
1802643008338788352 |
spelling |
ftnormandieuniv:oai:HAL:hal-01142647v1 2024-06-23T07:45:55+00:00 Diversification, Evolution and Sub-Functionalization of 70kDa Heat-Shock Proteins in Two Sister Species of Antarctic Krill: Differences in Thermal Habitats, Responses and Implications under Climate Change Cascella, Kévin Jollivet, Didier Papot, Claire Léger, Nelly Corre, Erwan Ravaux, Juliette Clark, Melody S. Toullec, Jean-Yves Adaptation et Biologie des Invertébrés en Conditions Extrêmes (ABICE) Adaptation et diversité en milieu marin (AD2M) Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Station biologique de Roscoff Roscoff (SBR) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 (Evo-Eco-Paléo (EEP)) Université de Lille-Centre National de la Recherche Scientifique (CNRS) Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) Phophorylation de protéines et Pathologies Humaines (P3H) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) 2015-04-02 https://hal.sorbonne-universite.fr/hal-01142647 https://hal.sorbonne-universite.fr/hal-01142647/document https://hal.sorbonne-universite.fr/hal-01142647/file/Cascella_2015_Diversification,.pdf https://doi.org/10.1371/journal.pone.0121642 en eng HAL CCSD Public Library of Science info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0121642 hal-01142647 https://hal.sorbonne-universite.fr/hal-01142647 https://hal.sorbonne-universite.fr/hal-01142647/document https://hal.sorbonne-universite.fr/hal-01142647/file/Cascella_2015_Diversification,.pdf doi:10.1371/journal.pone.0121642 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.sorbonne-universite.fr/hal-01142647 PLoS ONE, 2015, 10 (4), pp.e0121642. ⟨10.1371/journal.pone.0121642⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2015 ftnormandieuniv https://doi.org/10.1371/journal.pone.0121642 2024-06-04T00:07:13Z International audience BackgroundA comparative thermal tolerance study was undertaken on two sister species of Euphausiids (Antarctic krills) Euphausia superba and Euphausia crystallorophias. Both are essential components of the Southern Ocean ecosystem, but occupy distinct environmental geographical locations with slightly different temperature regimes. They therefore provide a useful model system for the investigation of adaptations to thermal tolerance.Methodology/Principal FindingInitial CTmax studies showed that E. superba was slightly more thermotolerant than E. crystallorophias. Five Hsp70 mRNAs were characterized from the RNAseq data of both species and subsequent expression kinetics studies revealed notable differences in induction of each of the 5 orthologues between the two species, with E. crystallorophias reacting more rapidly than E. superba. Furthermore, analyses conducted to estimate the evolutionary rates and selection strengths acting on each gene tended to support the hypothesis that diversifying selection has contributed to the diversification of this gene family, and led to the selective relaxation on the inducible C form with its possible loss of function in the two krill species.ConclusionsThe sensitivity of the epipelagic species E. crystallorophias to temperature variations and/or its adaptation to cold is enhanced when compared with its sister species, E. superba. These results indicate that ice krill could be the first of the two species to be impacted by the warming of coastal waters of the Austral ocean in the coming years due to climate change. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Austral Ocean Euphausia superba Southern Ocean Normandie Université: HAL Antarctic Austral Austral Ocean ENVELOPE(90.000,90.000,-60.000,-60.000) Southern Ocean PLOS ONE 10 4 e0121642 |