Multiple Genetic Trajectories to Extreme Abiotic Stress Adaptation in Arctic Brassicaceae
Abstract Extreme environments offer powerful opportunities to study how different organisms have adapted to similar selection pressures at the molecular level. Arctic plants have adapted to some of the coldest and driest biomes on Earth and typically possess suites of similar morphological and physi...
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ftoslouniv:oai:www.duo.uio.no:10852/83206 2023-05-15T14:27:47+02:00 Multiple Genetic Trajectories to Extreme Abiotic Stress Adaptation in Arctic Brassicaceae Birkeland, Siri Gustafsson, A Lovisa S Brysting, Anne Krag Brochmann, Christian Nowak, Michael 2020-09-18T09:29:45Z http://hdl.handle.net/10852/83206 http://urn.nb.no/URN:NBN:no-85970 https://doi.org/10.1093/molbev/msaa068 EN eng NFR/240223 http://urn.nb.no/URN:NBN:no-85970 Birkeland, Siri Gustafsson, A Lovisa S Brysting, Anne Krag Brochmann, Christian Nowak, Michael . Multiple Genetic Trajectories to Extreme Abiotic Stress Adaptation in Arctic Brassicaceae. Molecular biology and evolution. 2020, 37(7), 2052-2068 http://hdl.handle.net/10852/83206 1831055 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Molecular biology and evolution&rft.volume=37&rft.spage=2052&rft.date=2020 Molecular biology and evolution 37 7 2052 2068 https://doi.org/10.1093/molbev/msaa068 URN:NBN:no-85970 Fulltext https://www.duo.uio.no/bitstream/handle/10852/83206/5/msaa068.pdf Attribution-NonCommercial 4.0 International https://creativecommons.org/licenses/by-nc/4.0/ CC-BY-NC 0737-4038 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2020 ftoslouniv https://doi.org/10.1093/molbev/msaa068 2021-02-17T23:30:58Z Abstract Extreme environments offer powerful opportunities to study how different organisms have adapted to similar selection pressures at the molecular level. Arctic plants have adapted to some of the coldest and driest biomes on Earth and 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. Article in Journal/Newspaper Arctic Arctic Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Arctic Molecular Biology and Evolution 37 7 2052 2068 |
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Open Polar |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
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ftoslouniv |
language |
English |
description |
Abstract Extreme environments offer powerful opportunities to study how different organisms have adapted to similar selection pressures at the molecular level. Arctic plants have adapted to some of the coldest and driest biomes on Earth and 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. |
format |
Article in Journal/Newspaper |
author |
Birkeland, Siri Gustafsson, A Lovisa S Brysting, Anne Krag Brochmann, Christian Nowak, Michael |
spellingShingle |
Birkeland, Siri Gustafsson, A Lovisa S Brysting, Anne Krag Brochmann, Christian Nowak, Michael Multiple Genetic Trajectories to Extreme Abiotic Stress Adaptation in Arctic Brassicaceae |
author_facet |
Birkeland, Siri Gustafsson, A Lovisa S Brysting, Anne Krag 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 |
2020 |
url |
http://hdl.handle.net/10852/83206 http://urn.nb.no/URN:NBN:no-85970 https://doi.org/10.1093/molbev/msaa068 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic |
genre_facet |
Arctic Arctic |
op_source |
0737-4038 |
op_relation |
NFR/240223 http://urn.nb.no/URN:NBN:no-85970 Birkeland, Siri Gustafsson, A Lovisa S Brysting, Anne Krag Brochmann, Christian Nowak, Michael . Multiple Genetic Trajectories to Extreme Abiotic Stress Adaptation in Arctic Brassicaceae. Molecular biology and evolution. 2020, 37(7), 2052-2068 http://hdl.handle.net/10852/83206 1831055 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Molecular biology and evolution&rft.volume=37&rft.spage=2052&rft.date=2020 Molecular biology and evolution 37 7 2052 2068 https://doi.org/10.1093/molbev/msaa068 URN:NBN:no-85970 Fulltext https://www.duo.uio.no/bitstream/handle/10852/83206/5/msaa068.pdf |
op_rights |
Attribution-NonCommercial 4.0 International https://creativecommons.org/licenses/by-nc/4.0/ |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1093/molbev/msaa068 |
container_title |
Molecular Biology and Evolution |
container_volume |
37 |
container_issue |
7 |
container_start_page |
2052 |
op_container_end_page |
2068 |
_version_ |
1766301693709910016 |