Hydrodynamics of bacterial colonies

a model

Joceline C Lega, T. Passot

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We propose a hydrodynamic model for the evolution of bacterial colonies growing on soft agar plates. This model consists of reaction-diffusion equations for the concentrations of nutrients, water, and bacteria, coupled to a single hydrodynamic equation for the velocity field of the bacteria-water mixture. It captures the dynamics inside the colony as well as on its boundary and allows us to identify a mechanism for collective motion towards fresh nutrients, which, in its modeling aspects, is similar to classical chemotaxis. As shown in numerical simulations, our model reproduces both usual colony shapes and typical hydrodynamic motions, such as the whirls and jets recently observed in wet colonies of Bacillus subtilis. The approach presented here could be extended to different experimental situations and provides a general framework for the use of advection-reaction-diffusion equations in modeling bacterial colonies.

Original languageEnglish (US)
Pages (from-to)31906
Number of pages1
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume67
Issue number3
StatePublished - Mar 1 2003

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Hydrodynamics
Nutrients
Bacteria
hydrodynamics
Advection-diffusion-reaction Equation
Water
Collective Motion
Hydrodynamic Equations
Hydrodynamic Model
Chemotaxis
reaction-diffusion equations
Reaction-diffusion Equations
Modeling
Velocity Field
nutrients
Food
Simulation Model
bacteria
Bacillus subtilis
Numerical Simulation

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Hydrodynamics of bacterial colonies : a model. / Lega, Joceline C; Passot, T.

In: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Vol. 67, No. 3, 01.03.2003, p. 31906.

Research output: Contribution to journalArticle

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