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.

Evolutionary genomics of the cold-adapted diatom Fragilariopsis cylindrus

Dateien

Mock_0-394571.pdfGröße: 2.28 MBDownloads: 488

Datum

2017

Autor:innen

Mock, Thomas

Otillar, Robert P.

Strauss, Jan

McMullan, Mark

Paajanen, Pirita

Schmutz, Jeremy

Salamov, Asaf

Sanges, Remo

Gruber, Ansgar

Kroth, Peter G.

et al.

Open Access-Veröffentlichung

Open Access Hybrid

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Nature. 2017, 541(7638), pp. 536-540. ISSN 0028-0836. eISSN 1476-4687. Available under: doi: 10.1038/nature20803

Zusammenfassung

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.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Zitieren

ISO 690

MOCK, Thomas, Robert P. OTILLAR, Jan STRAUSS, Mark MCMULLAN, Pirita PAAJANEN, Jeremy SCHMUTZ, Asaf SALAMOV, Remo SANGES, Ansgar GRUBER, Peter G. KROTH, 2017. Evolutionary genomics of the cold-adapted diatom Fragilariopsis cylindrus. In: Nature. 2017, 541(7638), pp. 536-540. ISSN 0028-0836. eISSN 1476-4687. Available under: doi: 10.1038/nature20803

BibTex

@article{Mock2017-01-16Evolu-37359,
  year={2017},
  doi={10.1038/nature20803},
  title={Evolutionary genomics of the cold-adapted diatom Fragilariopsis cylindrus},
  number={7638},
  volume={541},
  issn={0028-0836},
  journal={Nature},
  pages={536--540},
  author={Mock, Thomas and Otillar, Robert P. and Strauss, Jan and McMullan, Mark and Paajanen, Pirita and Schmutz, Jeremy and Salamov, Asaf and Sanges, Remo and Gruber, Ansgar and Kroth, Peter G.}
}

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Universitätsbibliographie

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