Spreading of nonmotile bacteria on a hard agar plate: Comparison between agent-based and stochastic simulations
Authored by Pushpita Ghosh, Navdeep Rana, Prasad Perlekar
Date Published: 2017
DOI: 10.1103/physreve.96.052403
Sponsors:
Indian Department of Science & Technology (DST)
Platforms:
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Model Documentation:
Other Narrative
Mathematical description
Model Code URLs:
Model code not found
Abstract
We study spreading of a nonmotile bacteria colony on a hard agar plate
by using agent-based and continuum models. We show that the spreading
dynamics depends on the initial nutrient concentration, the motility,
and the inherent demographic noise. Population fluctuations are inherent
in an agent-based model, whereas for the continuum model we model them
by using a stochastic Langevin equation. We show that the intrinsic
population fluctuations coupled with nonlinear diffusivity lead to a
transition from a diffusion limited aggregation type of morphology to an
Eden-like morphology on decreasing the initial nutrient concentration.
Tags
morphology
Spatiotemporal patterns
growth
Organization
Dependence
Population-genetics
Bacillus-subtilis
Instabilities
Surface
Colonial development