The Physical Basis of Bacterial Quorum Communication by Stephen J. Hagen

Author:Stephen J. Hagen
Language: eng
Format: epub
Publisher: Springer New York, New York, NY

7.2 Possibilities and Limits in Diffusion Sensing

Different QS bacteria employ different autoinducers with a range of chemical and physical properties. These include the acyl homoserine lactones (AHLs) that are used by many Gram negative microbes, the peptides used by many Gram positives, and a variety of other small molecules. Some of these are transported by complex mechanisms. The quinolones of P. aeruginosa, for example, are packaged into vesicles [16] for transport. However, we focus here on the AHLs, which are believed generally to travel by diffusion and advection. In the absence of stirring or flow, gene activation from a diffusing signal should then develop in a way that is governed by the diffusion equation:

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