Physics-Biology interface seminar: Éric Raspaud

Elasticity and wrinkled morphology of Bacillus subtilis pellicles

Éric Raspaud (LPS Orsay)

Bacterial biofilms refer to communities of bacteria that self-assemble into an extracellular cohesive matrix on a surface. We are recently interested in floating biofilms formed by wild strains of Bacillus subtilis on liquid medium. Wrinkles appear during their maturation. We have studied the formation of wrinkles in relation to their mechanical property and have shown that they could be due to a buckling instability. In this talk I will present our experimental results and their theoretical interpretations.

140214_Raspaud

Top view of bacterial pellicles floating on liquid media. Two wild strains of Bacillus subtilis are shown in Figure A and B.

Trejo M., C. Douarche, V. Bailleux, C. Poulard, S. Mariot, C. Regeard, E. Raspaud, Elasticity and wrinkled morphology of Bacillus subtilis pellicles. Proc Natl Acad Sci USA 110 (2013), 2011-2016.


Date/Time : 14/02/2014 - 14:00 - 15:00

Location : Moyen Amphi, Building 510, Université Paris-Sud Orsay

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