Multiple genetic trajectories to extreme abiotic stress adaptation in Arctic Brassicaceae
Extreme environments offer powerful opportunities to study how different organisms have adapted to similar selection pressures at the molecular level. The Arctic is one of the most hostile environments on Earth, and the few plant species inhabiting this region typically possess suites of similar mor...
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ftzenodo:oai:zenodo.org:3998081 2023-05-15T14:33:32+02:00 Multiple genetic trajectories to extreme abiotic stress adaptation in Arctic Brassicaceae Birkeland, Siri Gustafsson, A. Lovisa S. Krag Brysting, Anne Brochmann, Christian Nowak, Michael 2022-11-22 https://zenodo.org/record/3998081 https://doi.org/10.5061/dryad.v41ns1rs0 unknown doi:10.1093/molbev/msaa068 https://zenodo.org/communities/dryad https://zenodo.org/record/3998081 https://doi.org/10.5061/dryad.v41ns1rs0 oai:zenodo.org:3998081 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode de novo transcriptome assembly Brassicaceae Cardamine bellidifolia Cochlearia groenlandica abiotic stress Draba nivalis info:eu-repo/semantics/other dataset 2022 ftzenodo https://doi.org/10.5061/dryad.v41ns1rs010.1093/molbev/msaa068 2023-03-10T19:05:18Z Extreme environments offer powerful opportunities to study how different organisms have adapted to similar selection pressures at the molecular level. The Arctic is one of the most hostile environments on Earth, and the few plant species inhabiting this region typically possess suites of similar morphological and physiological adaptations to extremes in light and temperature. Here we compare patterns of molecular evolution in three Brassicaceae species that have independently colonized the Arctic, and present some of the first genetic evidence for plant adaptations to the Arctic environment. By testing for positive selection and identifying convergent substitutions in orthologous gene alignments for a total of 15 Brassicaceae species, we find that positive selection has been acting on different genes, but similar functional pathways in the three Arctic lineages. The positively selected gene sets identified in the three Arctic species showed convergent functional profiles associated with extreme abiotic stress characteristic of the Arctic. However, there was little evidence for independently fixed mutations at the same sites and for positive selection acting on the same genes. The three species appear to have evolved similar suites of adaptations by modifying different components in similar stress response pathways, implying that there could be many genetic trajectories for adaptation to the Arctic environment. By identifying candidate genes and functional pathways potentially involved in Arctic adaptation, our results provide a framework for future studies aimed at testing for the existence of a functional syndrome of Arctic adaptation in the Brassicaceae and perhaps flowering plants in general. Sample details: CbA_topISO_121218_SHORT.FILTERED.cds/CbA_topISO_121218_SHORT.FILTERED.pep.fasta; Cardamine bellidifolia from Alaska/Yukon (border) (cds file/peptide file) CbS_topISO_121218_SHORT.FILTERED.cds/CbS_topISO_121218_SHORT.FILTERED.pep.fasta; Cardamine bellidifolia from Svalbard (cds file/peptide file) ... Dataset Arctic Cochlearia groenlandica Svalbard Alaska Yukon Zenodo Arctic Svalbard Yukon |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
de novo transcriptome assembly Brassicaceae Cardamine bellidifolia Cochlearia groenlandica abiotic stress Draba nivalis |
spellingShingle |
de novo transcriptome assembly Brassicaceae Cardamine bellidifolia Cochlearia groenlandica abiotic stress Draba nivalis Birkeland, Siri Gustafsson, A. Lovisa S. Krag Brysting, Anne Brochmann, Christian Nowak, Michael Multiple genetic trajectories to extreme abiotic stress adaptation in Arctic Brassicaceae |
topic_facet |
de novo transcriptome assembly Brassicaceae Cardamine bellidifolia Cochlearia groenlandica abiotic stress Draba nivalis |
description |
Extreme environments offer powerful opportunities to study how different organisms have adapted to similar selection pressures at the molecular level. The Arctic is one of the most hostile environments on Earth, and the few plant species inhabiting this region typically possess suites of similar morphological and physiological adaptations to extremes in light and temperature. Here we compare patterns of molecular evolution in three Brassicaceae species that have independently colonized the Arctic, and present some of the first genetic evidence for plant adaptations to the Arctic environment. By testing for positive selection and identifying convergent substitutions in orthologous gene alignments for a total of 15 Brassicaceae species, we find that positive selection has been acting on different genes, but similar functional pathways in the three Arctic lineages. The positively selected gene sets identified in the three Arctic species showed convergent functional profiles associated with extreme abiotic stress characteristic of the Arctic. However, there was little evidence for independently fixed mutations at the same sites and for positive selection acting on the same genes. The three species appear to have evolved similar suites of adaptations by modifying different components in similar stress response pathways, implying that there could be many genetic trajectories for adaptation to the Arctic environment. By identifying candidate genes and functional pathways potentially involved in Arctic adaptation, our results provide a framework for future studies aimed at testing for the existence of a functional syndrome of Arctic adaptation in the Brassicaceae and perhaps flowering plants in general. Sample details: CbA_topISO_121218_SHORT.FILTERED.cds/CbA_topISO_121218_SHORT.FILTERED.pep.fasta; Cardamine bellidifolia from Alaska/Yukon (border) (cds file/peptide file) CbS_topISO_121218_SHORT.FILTERED.cds/CbS_topISO_121218_SHORT.FILTERED.pep.fasta; Cardamine bellidifolia from Svalbard (cds file/peptide file) ... |
format |
Dataset |
author |
Birkeland, Siri Gustafsson, A. Lovisa S. Krag Brysting, Anne Brochmann, Christian Nowak, Michael |
author_facet |
Birkeland, Siri Gustafsson, A. Lovisa S. Krag Brysting, Anne Brochmann, Christian Nowak, Michael |
author_sort |
Birkeland, Siri |
title |
Multiple genetic trajectories to extreme abiotic stress adaptation in Arctic Brassicaceae |
title_short |
Multiple genetic trajectories to extreme abiotic stress adaptation in Arctic Brassicaceae |
title_full |
Multiple genetic trajectories to extreme abiotic stress adaptation in Arctic Brassicaceae |
title_fullStr |
Multiple genetic trajectories to extreme abiotic stress adaptation in Arctic Brassicaceae |
title_full_unstemmed |
Multiple genetic trajectories to extreme abiotic stress adaptation in Arctic Brassicaceae |
title_sort |
multiple genetic trajectories to extreme abiotic stress adaptation in arctic brassicaceae |
publishDate |
2022 |
url |
https://zenodo.org/record/3998081 https://doi.org/10.5061/dryad.v41ns1rs0 |
geographic |
Arctic Svalbard Yukon |
geographic_facet |
Arctic Svalbard Yukon |
genre |
Arctic Cochlearia groenlandica Svalbard Alaska Yukon |
genre_facet |
Arctic Cochlearia groenlandica Svalbard Alaska Yukon |
op_relation |
doi:10.1093/molbev/msaa068 https://zenodo.org/communities/dryad https://zenodo.org/record/3998081 https://doi.org/10.5061/dryad.v41ns1rs0 oai:zenodo.org:3998081 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.v41ns1rs010.1093/molbev/msaa068 |
_version_ |
1766306749456842752 |