Gwenaël Piganeau

How do the molecular determinants of antiviral resistance shape the dynamic of phytoplankton-virus interaction?

The paper models how antiviral resistance mechanisms in phytoplankton affect virus population dynamics, showing that bet-hedging strategies and intracellular resistance strongly reduce viral spread.

Adaptation to complex environments is associated with higher fitness costs under benign conditions

This study shows that adaptation to complex environments with multiple stressors leads to lower fitness gains and higher fitness reductions under benign conditions compared to single stressors.

Epidemiological model selection unravels the molecular processes of antiviral resistance from experimental phytoplankton-virus dynamics

The paper uses epidemiological models to identify molecular mechanisms of antiviral resistance in phytoplankton from experimental data.

Hypermutability of integrated sequences of viral origin in a Chlorarachniophyte

The paper identifies hypermutable regions in the nuclear genome of Bigelowiella natans, showing extreme mutation rate variation and a distinctive mutational signature in virus-derived sequences.

Plasticity of the mutation rate and spectrum in eukaryotic marine phytoplankton

This study measures mutation rate and spectrum plasticity in Ostreococcus tauri under different environmental conditions, finding significant variation in SNM rates and spectra.

A gapless telomere-to-telomere reference genome of Ostreococcus tauri RCC4221 with expanded annotation of medium-sized ncRNAs

The paper presents a gapless, telomere-to-telomere genome assembly of Ostreococcus tauri RCC4221 with improved annotation of noncoding RNAs and epigenomic features.

Effect of cellular nutrient economy on the evolution of genome size in phytoplankton

This study develops a theoretical framework linking cellular nutrient economy to genome size evolution in phytoplankton, showing that 1-bp indels can be counterselected under minimal nutrient conditions.

Metabolomic and Transcriptomic rewiring between virus resistance and susceptibility in Ostreococcus mediterraneus

This study integrates metabolomic and transcriptomic analyses to identify molecular mechanisms underlying virus resistance and susceptibility in Ostreococcus mediterraneus.

Chromoanagenesis is a driver of structural variationin the smallest photosynthetic eukaryote

The paper shows that resistance to a virus in Ostreococcus mediterraneus evolves rapidly through chromoplexy-driven structural variations on a single chromosome, without consistent SNPs or shared structural variants.

Genome wide assessment of genetic diversity and transcript variations in 17 accessions of the model diatom Phaeodactylum tricornutum

The paper assesses genetic and transcriptomic diversity in 17 Phaeodactylum tricornutum accessions, revealing increased genetic diversity and novel clades, while showing no link between sampling year and diversity loss.

Equatorial to Polar genomic variability of the microalgae Bathycoccus prasinos

The paper studies genomic variability in Bathycoccus prasinos across different oceanic temperatures, finding temperature-associated variant frequency changes and minimal mutational strategies for thermal adaptation.

The Seminavis robusta genome provides insights into the evolutionary adaptations of benthic diatoms

The paper reports the genome of Seminavis robusta, a benthic diatom, revealing gene family expansions and adaptations related to light and oxygen sensing, and provides insights into genetic diversity and gene function in benthic diatoms.

A genomics approach reveals the global genetic polymorphism, structure and functional diversity of ten accessions of the marine model diatom Phaeodactylum tricornutum

The paper uses whole genome sequencing of ten Phaeodactylum tricornutum accessions to reveal genetic polymorphism, structure, and functional diversity across geographic and temporal scales.