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A streamlined and predominantly diploid genome in the tiny marine green alga Chloropicon primus
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A streamlined and predominantly diploid genome in the tiny marine green alga Chloropicon primus
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Journal Article
A streamlined and predominantly diploid genome in the tiny marine green alga Chloropicon primus
2019
Overview
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.
The Chloropicophyceae represent an important group of green algae in tropical oceans, but there is only limited genomic resource available. Here, the authors present the genome sequence of
Chloropicon primus
, revealing a diploid structure and the presence of a propionate detoxification pathway.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
