Evolutionary genomics of the cold-adapted diatom Fragilariopsis cylindrus
The Southern Ocean houses a diverse and productive community of organisms. Unicellular eukaryotic diatoms are the main primary producers in this environment, where photosynthesis is limited by low concentrations of dissolved iron and large seasonal fluctuations in light, temperature and the extent o...
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ftubkonstanz:oai:kops.uni-konstanz.de:123456789/37359 2024-02-11T10:08:32+01:00 Evolutionary genomics of the cold-adapted diatom Fragilariopsis cylindrus Mock, Thomas Otillar, Robert P. Strauss, Jan McMullan, Mark Paajanen, Pirita Schmutz, Jeremy Salamov, Asaf Sanges, Remo Gruber, Ansgar Kroth, Peter G. 2017-01-16 application/pdf http://nbn-resolving.de/urn:nbn:de:bsz:352-0-394571 https://doi.org/10.1038/nature20803 eng eng http://nbn-resolving.de/urn:nbn:de:bsz:352-0-394571 http://dx.doi.org/10.1038/nature20803 28092920 483396389 http://creativecommons.org/licenses/by/4.0/ Nature. 2017, 541(7638), pp. 536-540. ISSN 0028-0836. eISSN 1476-4687. Available under: doi:10.1038/nature20803 ddc:570 doc-type:article doc-type:Text 2017 ftubkonstanz https://doi.org/10.1038/nature20803 2024-01-21T23:57:08Z The Southern Ocean houses a diverse and productive community of organisms. Unicellular eukaryotic diatoms are the main primary producers in this environment, where photosynthesis is limited by low concentrations of dissolved iron and large seasonal fluctuations in light, temperature and the extent of sea ice. How diatoms have adapted to this extreme environment is largely unknown. Here we present insights into the genome evolution of a cold-adapted diatom from the Southern Ocean, Fragilariopsis cylindrus, based on a comparison with temperate diatoms. We find that approximately 24.7 per cent of the diploid F. cylindrus genome consists of genetic loci with alleles that are highly divergent (15.1 megabases of the total genome size of 61.1 megabases). These divergent alleles were differentially expressed across environmental conditions, including darkness, low iron, freezing, elevated temperature and increased CO2. Alleles with the largest ratio of non-synonymous to synonymous nucleotide substitutions also show the most pronounced condition-dependent expression, suggesting a correlation between diversifying selection and allelic differentiation. Divergent alleles may be involved in adaptation to environmental fluctuations in the Southern Ocean. published published Article in Journal/Newspaper Sea ice Southern Ocean KOPS - The Institutional Repository of the University of Konstanz Southern Ocean Nature 541 7638 536 540 |
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KOPS - The Institutional Repository of the University of Konstanz |
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English |
topic |
ddc:570 |
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ddc:570 Mock, Thomas Otillar, Robert P. Strauss, Jan McMullan, Mark Paajanen, Pirita Schmutz, Jeremy Salamov, Asaf Sanges, Remo Gruber, Ansgar Kroth, Peter G. Evolutionary genomics of the cold-adapted diatom Fragilariopsis cylindrus |
topic_facet |
ddc:570 |
description |
The Southern Ocean houses a diverse and productive community of organisms. Unicellular eukaryotic diatoms are the main primary producers in this environment, where photosynthesis is limited by low concentrations of dissolved iron and large seasonal fluctuations in light, temperature and the extent of sea ice. How diatoms have adapted to this extreme environment is largely unknown. Here we present insights into the genome evolution of a cold-adapted diatom from the Southern Ocean, Fragilariopsis cylindrus, based on a comparison with temperate diatoms. We find that approximately 24.7 per cent of the diploid F. cylindrus genome consists of genetic loci with alleles that are highly divergent (15.1 megabases of the total genome size of 61.1 megabases). These divergent alleles were differentially expressed across environmental conditions, including darkness, low iron, freezing, elevated temperature and increased CO2. Alleles with the largest ratio of non-synonymous to synonymous nucleotide substitutions also show the most pronounced condition-dependent expression, suggesting a correlation between diversifying selection and allelic differentiation. Divergent alleles may be involved in adaptation to environmental fluctuations in the Southern Ocean. published published |
format |
Article in Journal/Newspaper |
author |
Mock, Thomas Otillar, Robert P. Strauss, Jan McMullan, Mark Paajanen, Pirita Schmutz, Jeremy Salamov, Asaf Sanges, Remo Gruber, Ansgar Kroth, Peter G. |
author_facet |
Mock, Thomas Otillar, Robert P. Strauss, Jan McMullan, Mark Paajanen, Pirita Schmutz, Jeremy Salamov, Asaf Sanges, Remo Gruber, Ansgar Kroth, Peter G. |
author_sort |
Mock, Thomas |
title |
Evolutionary genomics of the cold-adapted diatom Fragilariopsis cylindrus |
title_short |
Evolutionary genomics of the cold-adapted diatom Fragilariopsis cylindrus |
title_full |
Evolutionary genomics of the cold-adapted diatom Fragilariopsis cylindrus |
title_fullStr |
Evolutionary genomics of the cold-adapted diatom Fragilariopsis cylindrus |
title_full_unstemmed |
Evolutionary genomics of the cold-adapted diatom Fragilariopsis cylindrus |
title_sort |
evolutionary genomics of the cold-adapted diatom fragilariopsis cylindrus |
publishDate |
2017 |
url |
http://nbn-resolving.de/urn:nbn:de:bsz:352-0-394571 https://doi.org/10.1038/nature20803 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Sea ice Southern Ocean |
genre_facet |
Sea ice Southern Ocean |
op_source |
Nature. 2017, 541(7638), pp. 536-540. ISSN 0028-0836. eISSN 1476-4687. Available under: doi:10.1038/nature20803 |
op_relation |
http://nbn-resolving.de/urn:nbn:de:bsz:352-0-394571 http://dx.doi.org/10.1038/nature20803 28092920 483396389 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1038/nature20803 |
container_title |
Nature |
container_volume |
541 |
container_issue |
7638 |
container_start_page |
536 |
op_container_end_page |
540 |
_version_ |
1790607902381178880 |