DMCA
Spatio-selection in Expanding Bacterial Colonies (1999)
| Venue: | Physica A |
| Citations: | 2 - 1 self |
BibTeX
@ARTICLE{Golding99spatio-selectionin,
author = {Ido Golding and Inon Cohen and Eshel Ben-jacob},
title = {Spatio-selection in Expanding Bacterial Colonies},
journal = {Physica A},
year = {1999}
}
Share
 |
 |
 |
 |
||
OpenURL
Abstract
Segregation of populations is a key question in evolution theory. One important aspect is the relation between spatial organization and the population 's composition. Here we study a specific example -- sectors in expanding bacterial colonies. Such sectors are spatially segregated sub-populations of mutants. The sectors can be seen both in disk-shaped colonies and in branching colonies. We study the sectors using two models we have used in the past to study bacterial colonies -- a continuous reaction-diffusion model with non-linear diffusion and a discrete "Communicating Walkers" model. We find that in expanding colonies, and especially in branching colonies, segregation processes are more likely than in a spatially static population. One such process is the establishment of stable sub- population having neutral mutation. Another example is the maintenance of wild-type population along side with sub-population of advantageous mutants. Understanding such processes in bacterial colonies ...
Keyphrases
bacterial colony segregation process wild-type population stable sub population non-linear diffusion specific example sector continuous reaction-diffusion model static population spatial organization evolution theory disk-shaped colony walker model important aspect key question advantageous mutant neutral mutation
