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Accueil du site > Seminars > Previous seminars > Séminaires 2019 > Séminaire MSC. 16 Décembre 2019. Séverine Atis (University of Chicago). "On Growth and Form of Range Expansions at Liquid Interfaces.".

Séminaire MSC. 16 Décembre 2019. Séverine Atis (University of Chicago). "On Growth and Form of Range Expansions at Liquid Interfaces."

Unless otherwise stated, seminars and defences take place at 11:30 in room 454A of Condorcet building.


On Growth and Form of Range Expansions at Liquid Interfaces

Dr. Séverine Atis James Franck Institut, University of Chicago

Range expansions coupled with fluid flows are of great importance in understanding the organization and competition of microorganism populations in liquid environments. However, combining growth dynamics of an expanding assembly of cells with hydrodynamics leads to challenging problems, involving the coupling of nonlinear dynamics, stochasticity and transport. We have created an extremely viscous medium that allows us to grow cells on a controlled liquid interface over macroscopic scales. In this talk, I will present laboratory experiments, combined with numerical modeling, focused on the collective dynamics of genetically labeled microorganisms undergoing division and competition in the presence of a flow. I will show that an expanding population of microbes can itself generate a flow, leading to an accelerated propagation and fragmentation of the initial colony. Finally, I will show the mechanism at the origin of this metabolically generated flow and how it affects the growth and morphology of these microbial populations.


Contact : Équipe séminaires / Seminar team - Published on / Publié le 2 December 2019


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