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Colonial patterns formed by chemotactic bacteria E. coli

Presented by: 
Masayasu Mimura
Wednesday 22nd July 2015 - 13:30 to 14:45
INI Seminar Room 1
Over the past ten years, our understanding of how spatio-temporal patterns in far from equilibrium systems has been gradually deepened. Collaborative research of experimental and theoretical works have discovered the mechanism how complex patterns were generated in biological systems. It is emphasized that genetics does not always reveal the occurrence of such patterns and even simple systems may generate ordered as well as chaotic patterns in a self-organized way. As an example, Budrene and Berg observed that chemotactic bacteria of E. coli produce regulated as well as complex colonial patterns., depending on initial concentration of nutrients, In particular, flower-like patterns called “chevron pattern” is interesting ([1], [2]). Budrene and Berg concluded that such patterns are produced in a self-organized way. Motivated by their conclusion, we propose a macroscopic PDE model and Budrene and Berg understand the mechanism behind such colonial patterns ([3], [4], [5]).

Keywords: colonial pattern formation, chemotactic mobility, self-organization.

REFERENCES [1] Budrene E. O and Berg, H. C.: Complex patterns formed by motile cells of Escherichia coli., Nature 349 pp.630~633 (1991) [2] Budrene E. O and Berg, H. C.: Dynamics of formation of symmetrical patterns by chemotactic bacteria, Nature 376 pp. 49~53 (1995 [3] Aotani A., Mimura M. and Mollee T.: A model-aided understanding of spot pattern formation in chemotactic E. coli colonies, Japan J. Industrial and Applied Mathematics, 27, 5-22 (2010) [4] Celinski, R., Hilhorst D., Karch G. and Mimura M.: Mathematical properties of solutions to the model of formation of chemotactic E. coli. colonies, manuscript [5] Aotani A. and Mimura M.: Chevron patterns in chemotactic E. coli. colonies, in preparation
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University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons