E. Pelletier

Transportome remodeling of a symbiotic microalga inside a planktonic host

This study identifies sugar transporter remodeling in a symbiotic microalga, revealing how metabolic exchange is reprogrammed during photosymbiosis with a planktonic host.

New groups of highly divergent proteins in families as old as cellular life with important biological functions in the ocean

The paper identifies new divergent protein groups in ancient gene families from marine metagenomes, highlighting environmental diversity and potential biological novelty.

Picoeukaryotic photosynthetic potential is functionally redundant but taxonomically structured at global scale

The paper uses machine learning to analyze metagenomic data and shows that C4-photosynthesis genomic potential in picoeukaryotes is functionally redundant but taxonomically structured globally.

Bursts of novel composite gene families at major nodes in animal evolution

The paper identifies composite gene families in animals, showing they emerge abruptly at major evolutionary nodes and are independently evolved in multiple clades.

Genomic adaptation of giant viruses in polar oceans

This study investigates how giant viruses adapt to polar ocean environments by analyzing their biogeography and functional genes, finding that their adaptation is independent of host adaptation.

Whole-genome scanning reveals selection mechanisms in epipelagic Chaetoceros diatom populations

The paper uses genome-resolved metagenomics to analyze genetic diversity in Chaetoceros diatoms, revealing selection mechanisms related to nutrient availability in polar regions.

Plankton-infecting relatives of herpesviruses clarify the evolutionary trajectory of giant viruses

The paper identifies plankton-infecting herpesvirus relatives in marine environments, revealing a new viral phylum with evolutionary links to both herpesviruses and giant viruses.

Linking extreme seasonality and gene expression in arctic marine protists

The paper builds a transcriptome catalog of Arctic marine protists over 13 months and finds that gene expression correlates with seasonality, with higher transcript diversity during polar night and light-dependent functions during polar day.

Within-Arctic horizontal gene transfer as a driver of convergent evolution in distantly related microalgae

The paper identifies horizontal gene transfer as a driver of convergent evolution in Arctic microalgae, highlighting ice-binding domain gene transfers between distantly related species.

A robust approach to estimate relative phytoplankton cell abundance from metagenomes

This paper introduces a PCR-free method using the psbO gene to estimate phytoplankton abundance from metagenomes, showing better correlation with flow cytometry and microscopy than rRNA genes.

Heterotrophic bacterial diazotrophs are more abundant than their cyanobacterial counterparts in metagenomes covering most of the sunlit ocean

The paper identifies heterotrophic bacterial diazotrophs as more abundant than cyanobacterial diazotrophs in ocean metagenomes, expanding the known diversity of marine nitrogen fixers.

Genomic evidence for global ocean plankton biogeography shaped by large-scale current systems

The paper analyzes plankton genomic distribution across oceans to show how large-scale currents shape biogeography, revealing size-dependent patterns and basin-scale transport effects.

Global distribution patterns of marine nitrogen-fixers by imaging and molecular methods

The paper combines imaging and molecular data to analyze the global distribution of marine nitrogen-fixers, revealing size-related patterns and new high-density regions.

Functional repertoire convergence of distantly related eukaryotic plankton lineages revealed by genome-resolved metagenomics

The paper uses Tara Oceans metagenomic data to reconstruct and analyze eukaryotic genomes, revealing functional convergence among distantly related plankton lineages.

Evolutionary diversification of tiny ocean predators

This study examines four related marine picoeukaryotic predators, showing they have distinct genomic features and ecological adaptations that influence their coexistence and distribution.