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A streamlined and predominantly diploid genome in the tiny marine green alga Chloropicon primus

Author

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  • Claude Lemieux

    (Université Laval)

  • Monique Turmel

    (Université Laval)

  • Christian Otis

    (Université Laval)

  • Jean-François Pombert

    (Illinois Institute of Technology)

Abstract

Tiny marine green algae issued from two deep branches of the Chlorophyta, the Mamiellophyceae and Chloropicophyceae, dominate different regions of the oceans and play key roles in planktonic communities. Considering that the Mamiellophyceae is the sole lineage of prasinophyte algae that has been intensively investigated, the extent to which these two algal groups differ in their metabolic capacities and cellular processes is currently unknown. To address this gap of knowledge, we investigate here the nuclear genome sequence of a member of the Chloropicophyceae, Chloropicon primus. Among the main biological insights that emerge from this 17.4 Mb genome, we find an unexpected diploid structure for most chromosomes and a propionate detoxification pathway in green algae. Our results support the notion that separate events of genome minimization, which entailed differential losses of genes/pathways, have occurred in the Chloropicophyceae and Mamiellophyceae, suggesting different strategies of adaptation to oceanic environments.

Suggested Citation

  • Claude Lemieux & Monique Turmel & Christian Otis & Jean-François Pombert, 2019. "A streamlined and predominantly diploid genome in the tiny marine green alga Chloropicon primus," Nature Communications, Nature, vol. 10(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12014-x
    DOI: 10.1038/s41467-019-12014-x
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    Cited by:

    1. Zhiping Yang & Xiaoya Ma & Qiuping Wang & Xiaolin Tian & Jingyan Sun & Zhenhua Zhang & Shuhai Xiao & Olivier Clerck & Frederik Leliaert & Bojian Zhong, 2023. "Phylotranscriptomics unveil a Paleoproterozoic-Mesoproterozoic origin and deep relationships of the Viridiplantae," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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