Bacterial chemotaxis in confining geometries
- Event time: 1:00pm
- Event date: 16th December 2013
- Speaker: Elliot Marsden (Formerly School of Physics & Astronomy, University of Edinburgh)
- Location: Room 2511, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
Many bacteria have evolved the ability to move actively through their environment, and also to direct this motion towards beneficial substances or away from harmful ones, an ability known as chemotaxis. It has been suggested that in some conditions such chemicals may be secreted by bacteria themselves, introducing the potential for chemotaxis to be used for inter-bacterial signalling and collective motion. It has also been shown that non-uniform distributions of bacteria can be produced through control of the environmental topology. In this talk I will address the behaviour arising from the interplay of these two phenomena. I will introduce a theoretical model of chemotaxis, and show results of simulations with the aim of reproducing experimental data. These suggest that the interaction of bacteria with planar surfaces, coupled with chemotaxis towards a self-secreted chemoattractant, may explain spontaneous clustering in chemically uniform environments. This has implications for the control of bacterial populations via shaping of environmental geometry, and may provide insight into how bacteria can achieve a critical density for virulence through chemical signalling.
This is a weekly series of informal talks given primarily by members of the soft condensed matter and statistical mechanics groups, but is also open to members of other groups and external visitors. The aim of the series is to promote discussion and learning of various topics at a level suitable to the broad background of the group. Everyone is welcome to attend..