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Marie Christine Groleau

@mariecg.bsky.social
33 followers 35 following 9 posts
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Reposted by Marie Christine Groleau
Mozammel Hoque @mozammel.bsky.social · 20/09/2026
1/ New paper out in ISME Communications now in full version. Bacteria rarely live alone in nature, so we ran a 6-month evolution experiment asking what happens when species are forced to share the same biofilm. Turns out, company changes everything. 🧵 doi.org/10.1093/isme...
doi.org
Mixed-species interactions constrain diversification and shape biofilm evolution
Abstract. Experimental evolution provides a powerful framework for dissecting how ecological interactions shape adaptive trajectories. Here, we evolved Kle
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Reposted by Marie Christine Groleau
Institut national de la recherche scientifique @inrsciences.bsky.social · 15/09/2026
À l’INRS, la professeure Geneviève Lajoie explore une piste prometteuse : la lutte biologique par le microbiote des plantes. Son équipe étudie notamment comment le microbiote des plants de tomates réagit aux attaques d’insectes ravageurs.
inrs.ca
Geneviève Lajoie : Comment sauver nos récoltes des insectes envahissants?
Chaque année, dans le monde, un nombre croissant de récoltes sont endommagées ou perdues en raison des insectes envahissants. En plus de représenter une menace réelle pour la sécurité alimentaire cett...
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Reposted by Marie Christine Groleau
George O'Toole (he/him/his) @geiselbiofilm.bsky.social · 30/08/2026
Pls share: We have a new position for an Assistant Professor of Evolutionary Biology at UNLV. tinyurl.com/4uhpav4j
tinyurl.com
Assistant Professor in Evolutionary Biology, School of Life Sciences [R0153361]
The University of Nevada, Las Vegas (UNLV) appreciates your interest in employment. We ask that you keep in mind the following when completing your application: Once you start the application process ...
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Reposted by Marie Christine Groleau
Ajai Dandekar @ajaidandekar.bsky.social · 13/08/2026
Lab preprint! Zichu Yang, Anvita Billa, and Adi Desai systematically studied the DNA-binding domain of the quorum sensing transcription factor LasR. A collaboration with Matt Parsek
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Reposted by Marie Christine Groleau
Centre SÈVE @centre-seve.bsky.social · 12/06/2026
Le labo de Jean-Philippe Bellenger UdS est à la recherche stagiaire postdoctoral pour étudier les champignons en milieu aquatique. Jean-Philippe Bellenger’s lab at UdS is seeking a postdoctoral fellow to study fungi in aquatic environments. 🍄🐠 🖱️ centreseve.recherche.usherbrooke.ca/offre-de-pro...
centreseve.recherche.usherbrooke.ca
Offre de projet pour stagiaire post-doctorat- Université de Sherbrooke – Centre_seve
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Reposted by Marie Christine Groleau
Centre SÈVE @centre-seve.bsky.social · 12/06/2026
Le labo de Antoine Zboralski (IRBV) recherche étudiant au doctorat pour un projet sur les bactérie comme alternative aux pesticides. Antoine Zboralski's lab (IRBV) seeking for PhD student to work on bacteria as alternative to pesticides 🖱️⬇️🌱 centreseve.recherche.usherbrooke.ca/offre-de-pro...
centreseve.recherche.usherbrooke.ca
Offre projet de doctorat-IRBV – Centre_seve
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Reposted by Marie Christine Groleau
Centre SÈVE @centre-seve.bsky.social · 20/05/2026
Excellent dossier de @quebecscience.bsky.social sur l'agriculture durable. Le travail de certains de nos membres Centre SÈVE est mis en valeur: Maxime Paré, Tagnon Missihoun et @dezieleric.bsky.social ! 🌱 🧪 www.quebecscience.qc.ca/partenariat/...
quebecscience.qc.ca
Cultiver autrement : en chemin vers une agriculture durable
Préparer l’agriculture de demain
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Reposted by Marie Christine Groleau
Eric Déziel @dezieleric.bsky.social · 07/05/2026
we have this new paper out. Congratulations to my amazing research associate @mariecg.bsky.social for the great work! doi.org/10.1128/aem....
doi.org
Cranberry juice potentiates sensitivity of uropathogenic Escherichia coli (UPEC) strains to fosfomycin and decreases occurrence of spontaneous resistance | Applied and Environmental Microbiology
Antimicrobial resistance is a growing threat to public health, and new strategies are needed to preserve the activity of existing antibiotics. This study reveals that cranberry juice, a widely consume...
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Reposted by Marie Christine Groleau
Institut national de la recherche scientifique @inrsciences.bsky.social · 16/03/2026
Félicitations aux 3 équipes de l’INRS qui ont obtenu un financement majeur du Fonds d'innovation de la Canada Foundation for Innovation et du gouvernement du Québec :
inrs.ca
Un financement de 14 M$ pour accélérer l’innovation durable à l’INRS
La FCI soutient trois projets d’infrastructure qui répondent aux défis scientifiques et sociétaux actuels.
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Victor de Lorenzo (CNB, Madrid) @vdlorenzo.bsky.social · 27/01/2026
How do you react when your favorite microbe is renamed by taxonomists who are completely outside your field—and who ignore the community that actually works with it? Here is our clear answer re the case of Pseudomonas putida KT2440 👉🏻 journals.asm.org/doi/10.1128/...
journals.asm.org
The disputed identity of Pseudomonas putida KT2440: when taxonomists rename your favorite microbe | mBio
Names matter; they are not mere labels. They operate as anchors of memory, social coordinates, and references of collective identity. When a name becomes established through long-term use and broad ad...
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Reposted by Marie Christine Groleau
Ben Williamson @benpatrickwill.bsky.social · 19/12/2025
Closing out my year with a journal editor shocker 🧵 Checking new manuscripts today I reviewed a paper attributing 2 papers to me I did not write. A daft thing for an author to do of course. But intrigued I web searched up one of the titles and that's when it got real weird...
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Reposted by Marie Christine Groleau
George O'Toole (he/him/his) @geiselbiofilm.bsky.social · 15/12/2025
New in JB: Trottier, Déziel et al. show that despite the conservation of the PqsE sequence of P. aeruginosa and some key conserved functions, including and essential role for HAQ biosynthesis, this protein has different impacts across strains of Pa. journals.asm.org/doi/10.1128/...
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Reposted by Marie Christine Groleau
Ajai Dandekar @ajaidandekar.bsky.social · 23/10/2025
New lab paper! Andrew Frando describes how MexT alters the quorum sensing cascade in P. aeruginosa. /1 With Nicole Smalley; two undergraduates, Jamal Omar and Bobby Parsek; and @dezieleric.bsky.social, @mariecg.bsky.social, and Mylène Trottier at INRS in Montreal journals.asm.org/doi/10.1128/...
journals.asm.org
Modulation of the Pseudomonas aeruginosa quorum sensing cascade by MexT-regulated factors | mBio
Bacteria interact with both abiotic and biotic factors in their environment. Quorum sensing (QS) is one mechanism that bacteria use to communicate with other bacteria and coordinate behaviors in the p...
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Reposted by Marie Christine Groleau
Emmanuele Severi @emmseveri.bsky.social · 08/10/2025
www.biorxiv.org/content/10.1... #microsky
biorxiv.org
Pseudomonas aeruginosa lasR is a keystone gene in polymicrobial cultures
The airways of people with cystic fibrosis (CF) are often co-infected by Pseudomonas aeruginosa and a variety of other co-habiting microbes; the infections are polymicrobial. P. aeruginosa isolates fr...
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Reposted by Marie Christine Groleau
Fabrice Jean-Pierre @fabricejpierre.bsky.social · 30/09/2025
Plus que 10 jours avant la fin des soumissions des résumés pour le BiSP qui aura lieu le 5-6 novembre 2025 à l'Université de Sherbrooke. Nous aurons aussi la chance de recevoir @lalouxlab.bsky.social et @bjesseshapiro.bsky.social Partagez! @micrhub.bsky.social event.fourwaves.com/bispmicrhubs...
event.fourwaves.com
BiSP - MicrHub
Fourwaves - BiSP - MicrHub
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Reposted by Marie Christine Groleau
Eric Déziel @dezieleric.bsky.social · 05/09/2025
What to know more about #biosurfactants but do not know where to start? We are publishing a «Primer» on the topic! Great contribution from PhD student Maude Dagenais Roy www.microbiologyresearch.org/content/jour... Thanks to @microbiologysociety.org
microbiologyresearch.org
Microbial Primer: Biosurfactants – the ABCs of microbial surface-active metabolites
Microbial surfactants (biosurfactants) are low-molecular-weight amphiphilic secondary metabolites synthesized by a wide range of micro-organisms, including bacteria, yeasts and fungi. These compounds ...
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Reposted by Marie Christine Groleau
Eric Déziel @dezieleric.bsky.social · 08/07/2025
The 3rd International #Biosurfactants Conference will take place in Aachen, Germany September 8 -10 2025. Academia and industry will discuss the latest developments, and share cutting-edge insight in this exciting field of microbial #biotechnology #microsky biosurfactants.uni-hohenheim.de/en
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Institut national de la recherche scientifique @inrsciences.bsky.social · 12/06/2025
🌿Un projet scientifique innovant au Carré Laval L'INRS, @villedelavalqc.bsky.social, @genomequebec.bsky.social @fondsrechercheqc.bsky.social annoncent le lancement d'un projet unique sur le #microbiome urbain et son impact sur la santé globale. #recherche En savoir plus 👉 inrs.ca/actualites/l...
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Eric Déziel @dezieleric.bsky.social · 26/05/2025
Great new resource for Quorum sensing enthusiasts: a database linking LuxI-type synthases to their AHLs journals.asm.org/doi/full/10....
journals.asm.org
RefAHL: a curated quorum sensing reference linking diverse LuxI-type signal synthases with their acyl-homoserine lactone products | Microbiology Resource Announcements
Many bacteria use acyl-homoserine lactone (AHL) signal compounds, produced by the LuxI-family of synthases and detected by the LuxR-family of transcriptional regulators, in cell density-dependent gene...
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Reposted by Marie Christine Groleau
Eric Déziel @dezieleric.bsky.social · 18/05/2025
New work from the lab! Sometimes going beyond prototypical strains such as PAO1 or PA14 tells a more complex and nuanced story.
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bioRxiv Microbiology @biorxiv-microbiol.bsky.social · 17/05/2025
PqsE is conserved and functionally relevant in Pseudomonas aeruginosa www.biorxiv.org/content/10.1101/202…
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Reposted by Marie Christine Groleau
Sebastian S. Cocioba @atinygreencell.bsky.social · 02/05/2025
I got hit by some rather sudden and extreme financial hardship so if anyone is in need of remote wetlab contract research, strictly BSL1, do let me know. Currently scrambling for gigs. Plant, Bacterial, Archaeal Non-model Bioeng Custom Lab Hardware Turn Key Genetic Design Please repost for reach 💚
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Reposted by Marie Christine Groleau
Quanta Magazine @quantamagazine.org · 22/04/2025
www.quantamagazine.org/how-a-biofil...
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Institut national de la recherche scientifique @inrsciences.bsky.social · 15/04/2025
Au total, les professeurs Eric Déziel et Étienne Yergeau reçoivent un soutien financier de 2,8 M$ du Programme des chaires de recherche du Canada qui appuie des chercheuses et chercheurs parmi les plus prometteurs et les plus accomplis au monde. inrs.ca/actualites/d...
inrs.ca
Deux nouvelles chaires de recherche en microbiologie à l’INRS
Deux nouvelles chaires de recherche du Canada pour étudier les interactions microbiennes et leur impact sur la santé et l’environnement.
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Reposted by Marie Christine Groleau
Ákos T Kovács @evolvedbiofilm.bsky.social · 14/04/2025
Colony morphotype variation in Burkholderia: implications for success of applications and therapeutics #JBacteriol by @pmlcoulon.bsky.social et al journals.asm.org/doi/10.1128/...
journals.asm.org
Colony morphotype variation in Burkholderia: implications for success of applications and therapeutics | Journal of Bacteriology
The Burkholderia genus, comprising over 90 species (1, 2), is a member of the β-proteobacteria subphylum and is widely distributed in various environments such as the atmosphere, soil, water, plant rh...
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Reposted by Marie Christine Groleau
pbbeauregard.bsky.social @pbbeauregard.bsky.social · 08/04/2025
Réservez les dates! Le BiSP (bactériologie intégrative, symbiose et pathogénèse) aura lieu le 5 et 6 novembre à l'Université de Sherbrooke - un événement qui sera en "symbiose" avec le MicrHub, rencontre annuelle de tous les microbiologistes de Sherbrooke. À ne pas manquer!
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George O'Toole (he/him/his) @geiselbiofilm.bsky.social · 02/04/2025
New in JB: Coulon, Deziel, et al. explore quorum sensing and DNA methylation in phase variation in Burkholderia clinical isolates. journals.asm.org/doi/10.1128/... @asm.org #JBacteriology
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Institut national de la recherche scientifique @inrsciences.bsky.social · 02/04/2025
Le professeur Éric Déziel fait figure de pionnier dans l’étude des #biosurfactants. Avec son équipe, il a mis au point une méthode innovante d'évolution dirigée, inspirée de la sélection naturelle, pour améliorer leur production et rendre leur utilisation plus accessible. inrs.ca/actualites/l...
inrs.ca
La sélection naturelle au service de produits nettoyants plus écologiques ?
Une étude de l'INRS sur la sélection naturelle ouvre la voie à des avancées très prometteuses dans le secteur des biosurfactants
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Prof. Isabelle Laforest-Lapointe @ilafores.bsky.social · 31/03/2025
Le groupe de Biologie Moléculaire du Département de Biologie recrute! Une 4e embauche en 2 ans, joignez-vous à une équipe jeune, à un département dynamique, au sein d'une institution exceptionnelle, dans un pays démocratique. www.usherbrooke.ca/emplois/offr...
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Eric Déziel @dezieleric.bsky.social · 18/02/2025
The International Workshop on ‘Cell-cell communication in bacteria’ (CCCB25) to be held in Trieste, Italy, October 28-30 2025 is now open for abstract submission and registration www.icgeb.org/cell-cell-co... Some abstracts will be selected for oral presentations. #quorum-sensing
icgeb.org
Arturo Falaschi Conference “Cell-cell communication in bacteria: new insights and future trends”
Trieste, Italy 28 – 30 October 2025 – CALL FOR APPLICATIONS AND REGISTRATIONS NOW OPEN
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Reposted by Marie Christine Groleau
Eric Déziel @dezieleric.bsky.social · 17/02/2025
A new line of research in the lab over recent years! We start with a review article, by postdoc Nasim Sedighian as lead author - Ecofriendly Control Strategies Against Clavibacter michiganensis, the Causal Agent of Bacterial Canker of Tomato | Plant Disease apsjournals.apsnet.org/doi/10.1094/...
apsjournals.apsnet.org
Ecofriendly Control Strategies Against Clavibacter michiganensis, the Causal Agent of Bacterial Canker of Tomato | Plant Disease
Bacterial canker of tomato, caused by the pathogenic Gram-positive bacterium Clavibacter michiganensis, represents a serious threat to tomato growers worldwide. Diverse approaches have been reported t...
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Eric Déziel @dezieleric.bsky.social · 17/02/2025
New paper out! Phenotypic variation is a feature of several Burkholderia species. We found that quorum sensing and adenosine DNA methylation are two antagonistic systems independently controlling phase variation in B. ambifaria. Great work by @pmlcoulon.bsky.social journals.asm.org/doi/10.1128/...
journals.asm.org
Quorum sensing and DNA methylation play active roles in clinical Burkholderia phase variation | Journal of Bacteriology
Some Burkholderia species are pathogenic to plants, animals, or humans. In immunocompromised individuals, and people suffering from cystic fibrosis, infection from the Burkholderia cepacia complex (Bc...
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Pauline M.L. Coulon @pmlcoulon.bsky.social · 17/02/2025
Excited to share this article with the community! Many thanks to @dezieleric.bsky.social for allowing me to start this work during my PhD and for his continued support. I also appreciate @mariecg.bsky.social for her amazing contribution and constant support!
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Marie Christine Groleau @mariecg.bsky.social · 21/09/2023
New paper on line from the Déziel lab. "Surface growth of Pseudomonas aeruginosa reveals a regulatory effect of 3-oxo-C12-homoserine lactone in the absence of its cognate receptor, LasR" journals.asm.org/doi/10.1128/... Check it out !
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