The interaction of thin-film flow, bacterial swarming and cell differentiation in colonies of Serratia liquefaciens

被引:38
作者
Bees, MA [1 ]
Andresén, P
Mosekilde, E
Givskov, M
机构
[1] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark
[2] Tech Univ Denmark, Dept Microbiol, DK-2800 Lyngby, Denmark
关键词
swarming; bacteria; differentiation; wetting agent; thin film theory; hydrodynamics;
D O I
10.1007/s002850050004
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
The rate of expansion of bacterial colonies of S. liquefaciens is investigated in terms of a mathematical model that combines biological as well as hydrodynamic processes. The relative importance of cell differentiation and production of an extracellular wetting agent to bacterial swarming is explored using a continuum representation. The model incorporates aspects of thin film flow with variable suspension viscosity, wetting, and cell differentiation. Experimental evidence suggests that the bacterial colony is highly sensitive to its environment and that a variety of mechanisms are exploited in order to proliferate on a variety of surfaces. It is found that a combination of effects are required to reproduce the variation of bacterial colony motility over a large range of nutrient availability and medium hardness.
引用
收藏
页码:27 / 63
页数:37
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