Gontran Arnault

Check out our new preprint using 30 SynComs covering a phylogenetic diversity gradient, we uncover many interesting strain and community features involved in seed to seedling bacterial transmission 🧫🌱
@emersys-irhs.bsky.social in the SUCSEED project @inrae-dpt-spe.bsky.social

🌾 Take-home message:
Seedling colonization is shaped not only by microbial traits but also by microbial interactions, a key insight for engineering seed and seedling microbiomes.

🧬 Genomic analyses highlight traits linked to efficient seedling colonization:
✔️ amino acid transport and metabolism
✔️ stress tolerance
✔️ ROS detoxification
✔️ biofilm formation

🤖 RF model shows that strain ID is the most important feature, suggesting that testing strains across multiple community contexts helps reveal their competitive potential.

📊 Two major predictors also emerge: Phylogenetic and metabolic relatedness, supporting the competition–relatedness hypothesis.

🔍 Key result:
👉 Colonization success is strongly modulated by community context and cannot be predicted from single-strain performance alone, showing that microbial interactions are crucial.

🧪 We used a Synthetic Community (SynCom) approach on common bean (Phaseolus vulgaris), testing 30 bacterial communities spanning a phylogenetic diversity gradient.

🌱 The seed-to-seedling transition is a key step where seed microbiota meets soil microbiota.
It’s a phase of strong microbial selection (exudates, oxidative stress, etc.).

🌱 New preprint with @microbialmarie.bsky.social www.biorxiv.org/content/10.6...
Bacterial Strain Identity and Community Composition Drive the Seed-to-Seedling Microbiota Assembly
We explore which strain traits and community features explain successful bacterial transmission from seed to seedling.⬇️

#PMS2025 Check the posters of my 2 wonderful PhD students @logansuteau.bsky.social & Louna Colaert-Sentenac!

Results on multi-kingdom SynCom experiments inoculated on seeds to perform plant microbiome engineering & promote pathogen resistance on rapeseed & common bean 🫘 🌱
@emersys-irhs.bsky.social

Happy to see our paper out in Current Op in Microbiology!
We show how transient microbes can play key roles in plant fitness & microbiota assembly 🦠
The 1st 1st author article for my 2 fantastic PhD students @logansuteau.bsky.social & Louna Coleart-Sentenac 🎉
www.sciencedirect.com/science/arti...

Synthetic Community Inoculation on Seeds Revealed its Transient Colonization Capacity but Legacy Effects on Plant Microbiota Assembly Seed microbiota have the potential to influence the overall plant microbiota assembly. However, to date, studies have mostly focused on early plant development stages. This study aimed to investigate ...

Synthetic Community Inoculation on Seeds Revealed its Transient Colonization Capacity but Legacy Effects on Plant Microbiota Assembly
Nice SynCom work by @microbialmarie.bsky.social @garnault.bsky.social 😊