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TRENDING OPEN SCIENCE
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Functional repertoire convergence of distantly related eukaryotic
plankton lineages revealed by genome-resolved metagenomics
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By
Tom O. Delmont
Morgan Gaia
Damien D. Hinsinger
Paul Fremont
Chiara Vanni
Antonio Fernandez Guerra
A. Murat Eren
Artem Kourlaiev
Leo d'Agata
Quentin Clayssen
Emilie Villar
Karine Labadie
Corinne Cruaud
Julie Poulain
Corinne Da Silva
Marc Wessner
Benjamin Noel
Jean-Marc Aury
Tara Oceans Coordinators
Colomban de Vargas
Chris Bowler
Eric Karsenti
Eric Pelletier
Patrick Wincker
Olivier Jaillon
DOI: 10.1101/2020.10.15.341214
On bioRxiv: https://www.biorxiv.org/content/10.1101/2020.10.15.341214v1
Marine planktonic eukaryotes play a critical role in global
biogeochemical cycles and climate. However, their poor representation
in culture collections limits our understanding of the evolutionary
history and genomic underpinnings of planktonic ecosystems. Here, we
used 280 billion Tara Oceans metagenomic reads from polar, temperate,
and tropical sunlit oceans to reconstruct and manually curate more
than 700 abundant and widespread eukaryotic environmental genomes
ranging from 10 Mbp to 1.3 Gbp. This genomic resource covers a wide
range of poorly characterized eukaryotic lineages that complement
long-standing contributions from culture collections while better
representing plankton in the upper layer of the oceans. We performed
the first comprehensive genome-wide functional classification of
abundant unicellular eukaryotic plankton, revealing four major groups
connecting distantly related lineages. Neither trophic modes of
plankton nor its vertical evolutionary history could explain the
functional repertoire convergence of major eukaryotic lineages that
coexisted within oceanic currents for millions of years.
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