Laboratoire AstroParticules et Cosmologie, CNRS, Université Paris-Diderot, Université de Paris, 5 rue Thomas Mann 75013 Paris, France.
ESPCI Paris, PSL Research University, CNRS, Institut Langevin, 1 rue Jussieu, F-75005 Paris, France.
Phys Rev E. 2020 Feb;101(2-1):022612. doi: 10.1103/PhysRevE.101.022612.
We study the clustering of a model cyanobacterium Synechocystis into microcolonies. The bacteria are allowed to diffuse onto surfaces of different hardness and interact with the others by aggregation and detachment. We find that soft surfaces give rise to more microcolonies than hard ones. This effect is related to the amount of heterogeneity of bacteria's dynamics as given by the proportion of motile cells. A kinetic model that emphasizes specific interactions between cells, complemented by extensive numerical simulations considering various amounts of motility, describes the experimental results adequately. The high proportion of motile cells enhances dispersion rather than aggregation.
我们研究了模型蓝藻集胞藻如何形成微菌落。细菌在不同硬度的表面上扩散并通过聚集和脱落与其他细菌相互作用。我们发现，软表面比硬表面产生更多的微菌落。这种效应与细菌动力学的异质性程度有关，由运动细胞的比例给出。一个强调细胞之间特定相互作用的动力学模型，辅以考虑不同运动程度的大量数值模拟，充分描述了实验结果。高比例的运动细胞增强了分散而不是聚集。
