Offre de MSc avec @pbbeauregard.bsky.social Mirella Aoun et moi #agriculture #durable #écologie #microbienne

Open MSc position #sustainable #agriculture #microbial #ecology

Un partenariat entre Bishop's University & @usherbrooke.bsky.social

C'est le temps d'appliquer! 🕐🤩

Time to apply! 🕐🤩

My vintage protocol uses the sodium salt for glutamic acid, and the pH of the MOPS stock solution is adjusted with NaOH. So, the final medium contains a mix of both. We also recently observed that the exclusive presence of K vs Na changed the phenotype of the colony.

BiSP - MicrHub Fourwaves - BiSP - MicrHub

Nous aurons le plaisir d'accueillir Géraldine Laloux (UCLouvain) et Jesse Shapiro (Université McGill), et il y aura de multiples possibilités de présentations et d'affiches. Suivez @micrhub.bsky.social pour des mises à jour, et l'inscription est ici : event.fourwaves.com/fr/bispmicrh...

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!

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...

Pour pallier à mon anxiété (merci Trump) je cuisine. Donc aujourd’hui j’ai fait des “baked oats cup”, des chips pita au zaatar, un pain au levain, une soupe poulet nouille pour les lunch et des brownies. Ça va vaguement mieux?

Interesting! I have never seen that before. No idea what/why it is different!!

CotA of Bacillus subtilis Is a Copper-Dependent Laccase | Journal of Bacteriology ABSTRACT The spore coat protein CotA of Bacillus subtilisdisplays similarities with multicopper oxidases, including manganese oxidases and laccases. B. subtilis is able to oxidize manganese, but neither CotA nor other sporulation proteins are involved. We ...

We use Na-glutamate but I am unsure if it makes a difference. This could help : journals.asm.org/doi/10.1128/...

My take is that the brown pigment is this spore-associated thing, and it depends on pulcherrimin since pulch is required for correct colony development. Some pulch is likely there too.

Or it could be partially complexed pulcherriminic acid (so a bit of pulcherrimin + free pulcherriminic acid) - pulcherriminic acid is soluble.

To me, left is typical pulcherrimin, red and insoluble. Right is a "brown pigment associated to spore" (no idea what it is exactly) that we observe sometimes (our colonies on MSgg secrete red pigment). It could be dependent of Fe and pulcherrimin because both are required for B. subtilis biofilm.

#proudPI #alittletirednow

Busy week! Paula did an excellent job presenting her project (in her third langage - french!) to the Centre Sève on thursday, on Bacillus species helping or not N fixation. Then, JS, Sandrine and I talked about our research at La nuit des chercheurs hosted by the Science museum of Sherbrooke.

Toujours un plaisir d’aller discuter des plantes sous tous leurs angles aux Journées du #CentreSEVE !

Starting off the annual #CentreSEVE meeting with @balachaudhary.bsky.social on mycorrhizal dispersal

Congrat Julie for your article, great work!

In presence of high N, B. subtilis negatively impacts A. vinelandii growth; in low N, A. vinelandii feed N to B. subtilis, which in return strongly stimulates Azoto N-fixing activity. Another great collaboration with my chemist colleague JP Bellenger!

Azotobacter vinelandii N2 fixation increases in co-culture with the PGPR Bacillus subtilis in a nitrogen concentration-dependent manner | Applied and Environmental Microbiology Reducing inputs of chemical N fertilizers is essential to develop a more sustainable agriculture. The stimulation of biological nitrogen fixation by N2 fixers in multispecies cultures, here the plant growth-promoting rhizobacteria Azotobacter vinelandii ...

New article alert! Here, PhD student Julie Leroux elegantly shows how N availability influences the interaction between a diazotroph, Azotobacter vinelandii, and our favorite PGPR Bacillus subtilis. journals.asm.org/doi/10.1128/...