Dynamic clustering in suspension of motile bacteria
Dynamic clustering in suspension of motile bacteria
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DOI：
10.1209/0295-5075/111/54002
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发表时间：
2015-09-01
期刊：
影响因子：
1.8
通讯作者：
Zhang, H. P.
中科院分区：
文献类型：
--
作者：
Chen, Xiao;Yang, Xiang;Zhang, H. P.
细菌悬浮液表现出广泛的集体现象，由单个细胞之间的相互作用引起。在这里，我们显示粘质沙雷氏菌细胞附近的空气-液体界面自发聚集成动态集群通过表面介导的流体动力学相互作用。这些长寿的星系团随机平移并逆时针旋转;它们不断进化，与其他星系团合并并分裂成更小的星系团。测量结果表明，长程流体动力学相互作用对团簇性质有很强的影响。细菌簇改变界面附近的材料和流体运输，因此可能具有环境和生物后果。Copyright（C）2015 - 2019 www.cnjs.com版权所有
Bacteria suspension exhibits a wide range of collective phenomena, arising from interactions between individual cells. Here we show Serratia marcescens cells near an air-liquid interface spontaneously aggregate into dynamic clusters through surface-mediated hydrodynamic interactions. These long-lived clusters translate randomly and rotate in the counterclockwise direction; they continuously evolve, merge with others and split into smaller ones. Measurements indicate that long-ranged hydrodynamic interactions have strong influences on cluster properties. Bacterial clusters change material and fluid transport near the interface and hence may have environmental and biological consequences. Copyright (C) EPLA, 2015