Volume 48, Number 5, December 1999
|Page(s)||587 - 593|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 September 2002|
Studies of sector formation in expanding bacterial colonies
School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69 978, Israel
Accepted: 1 October 1999
We study sector formation in expanding bacterial colonies grown on a substrate with low level of nutrient. Bursts of sectors are observed both during compact growth on soft agar and during branching growth on semi-solid agar. For theoretical studies of these bursts we employ two mathematical models we have used successfully in the past to study patterning of bacterial colonies: a discrete model and a continuous reaction-diffusion model. Using these models we investigate the amount of segregation achieved by a neutral mutation, as well as by mutations having some advantage over the wild type. We also study the effect of chemotaxis signaling on the sector formation.
PACS: 87.10.+e – Biological and medical physics: General theory and mathematical aspects
© EDP Sciences, 1999
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