Evolutionary genomics of the cold-Adapted diatom Fragilariopsis cylindrus
© 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. 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 di...
Published in: | Nature |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
eScholarship, University of California
2017
|
Subjects: | |
Online Access: | http://www.escholarship.org/uc/item/7pt9h997 |
id |
ftcdlib:qt7pt9h997 |
---|---|
record_format |
openpolar |
spelling |
ftcdlib:qt7pt9h997 2023-05-15T18:18:26+02:00 Evolutionary genomics of the cold-Adapted diatom Fragilariopsis cylindrus Mock, T Otillar, RP Strauss, J McMullan, M Paajanen, P Schmutz, J Salamov, A Sanges, R Toseland, A Ward, BJ Allen, AE Dupont, CL Frickenhaus, S Maumus, F Veluchamy, A Wu, T Barry, KW Falciatore, A Ferrante, MI Fortunato, AE Glöckner, G Gruber, A Hipkin, R Janech, MG Kroth, PG Leese, F Lindquist, EA Lyon, BR Martin, J Mayer, C Parker, M Quesneville, H Raymond, JA Uhlig, C Valas, RE Valentin, KU Worden, AZ Armbrust, EV Clark, MD Bowler, C Green, BR Moulton, V Van Oosterhout, C Grigoriev, IV 536 - 540 2017-01-26 application/pdf http://www.escholarship.org/uc/item/7pt9h997 english eng eScholarship, University of California qt7pt9h997 http://www.escholarship.org/uc/item/7pt9h997 public Mock, T; Otillar, RP; Strauss, J; McMullan, M; Paajanen, P; Schmutz, J; et al.(2017). Evolutionary genomics of the cold-Adapted diatom Fragilariopsis cylindrus. Nature, 541(7638), 536 - 540. doi:10.1038/nature20803. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/7pt9h997 article 2017 ftcdlib https://doi.org/10.1038/nature20803 2018-07-13T22:57:28Z © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. 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. Article in Journal/Newspaper Sea ice Southern Ocean University of California: eScholarship Southern Ocean Nature 541 7638 536 540 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
description |
© 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. 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. |
format |
Article in Journal/Newspaper |
author |
Mock, T Otillar, RP Strauss, J McMullan, M Paajanen, P Schmutz, J Salamov, A Sanges, R Toseland, A Ward, BJ Allen, AE Dupont, CL Frickenhaus, S Maumus, F Veluchamy, A Wu, T Barry, KW Falciatore, A Ferrante, MI Fortunato, AE Glöckner, G Gruber, A Hipkin, R Janech, MG Kroth, PG Leese, F Lindquist, EA Lyon, BR Martin, J Mayer, C Parker, M Quesneville, H Raymond, JA Uhlig, C Valas, RE Valentin, KU Worden, AZ Armbrust, EV Clark, MD Bowler, C Green, BR Moulton, V Van Oosterhout, C Grigoriev, IV |
spellingShingle |
Mock, T Otillar, RP Strauss, J McMullan, M Paajanen, P Schmutz, J Salamov, A Sanges, R Toseland, A Ward, BJ Allen, AE Dupont, CL Frickenhaus, S Maumus, F Veluchamy, A Wu, T Barry, KW Falciatore, A Ferrante, MI Fortunato, AE Glöckner, G Gruber, A Hipkin, R Janech, MG Kroth, PG Leese, F Lindquist, EA Lyon, BR Martin, J Mayer, C Parker, M Quesneville, H Raymond, JA Uhlig, C Valas, RE Valentin, KU Worden, AZ Armbrust, EV Clark, MD Bowler, C Green, BR Moulton, V Van Oosterhout, C Grigoriev, IV Evolutionary genomics of the cold-Adapted diatom Fragilariopsis cylindrus |
author_facet |
Mock, T Otillar, RP Strauss, J McMullan, M Paajanen, P Schmutz, J Salamov, A Sanges, R Toseland, A Ward, BJ Allen, AE Dupont, CL Frickenhaus, S Maumus, F Veluchamy, A Wu, T Barry, KW Falciatore, A Ferrante, MI Fortunato, AE Glöckner, G Gruber, A Hipkin, R Janech, MG Kroth, PG Leese, F Lindquist, EA Lyon, BR Martin, J Mayer, C Parker, M Quesneville, H Raymond, JA Uhlig, C Valas, RE Valentin, KU Worden, AZ Armbrust, EV Clark, MD Bowler, C Green, BR Moulton, V Van Oosterhout, C Grigoriev, IV |
author_sort |
Mock, T |
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 |
publisher |
eScholarship, University of California |
publishDate |
2017 |
url |
http://www.escholarship.org/uc/item/7pt9h997 |
op_coverage |
536 - 540 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Sea ice Southern Ocean |
genre_facet |
Sea ice Southern Ocean |
op_source |
Mock, T; Otillar, RP; Strauss, J; McMullan, M; Paajanen, P; Schmutz, J; et al.(2017). Evolutionary genomics of the cold-Adapted diatom Fragilariopsis cylindrus. Nature, 541(7638), 536 - 540. doi:10.1038/nature20803. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/7pt9h997 |
op_relation |
qt7pt9h997 http://www.escholarship.org/uc/item/7pt9h997 |
op_rights |
public |
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_ |
1766195004932358144 |