PMMH, UMR 7636 CNRS, ESPCI Paris, PSL Research University, Sorbonne Université and Université Paris Cité, 7-9 quai Saint-Bernard, Paris, 75005, France.
SUPA and the School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom.
Phys Rev Lett. 2022 Jun 17;128(24):248101. doi: 10.1103/PhysRevLett.128.248101.
Motile bacteria are known to accumulate at surfaces, eventually leading to changes in bacterial motility and biofilm formation. We use a novel two-color, three-dimensional Lagrangian tracking technique to follow simultaneously the body and the flagella of a wild-type Escherichia coli. We observe long surface residence times and surface escape corresponding mostly to immediately antecedent tumbling. A motility model accounting for a large behavioral variability in run-time duration reproduces all experimental findings and gives new insights into surface trapping efficiency.
运动细菌已知会在表面聚集，最终导致细菌运动性和生物膜形成的变化。我们使用一种新颖的双色、三维拉格朗日跟踪技术来同时跟踪野生型大肠杆菌的菌体和鞭毛。我们观察到较长的表面停留时间和表面逃逸，这些主要对应于立即在前的翻滚。一个能够解释运行时间持续时间大的行为可变性的运动模型再现了所有实验结果，并为表面捕获效率提供了新的见解。
