Collective motion of spherical bacteria.
Collective motion of spherical bacteria.
复制标题
球形细菌的集体运动。
DOI：
10.1371/journal.pone.0083760
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Be'er A
中科院分区：
文献类型：
--
作者：
Rabani A;Ariel G;Be'er A
大量种类的运动细菌物种在栖息于液体或定殖表面时表现出集体运动。这些集体运动的特点往往是连贯的动态集群，其中数百个细胞在相关的漩涡和射流移动。以前，所有已知形成这种运动的物种都具有杆状结构，通过空间和流体动力学相互作用增强了秩序。在这里，我们表明，球形能动细菌粘质沙雷氏菌表现出强大的集体动力学和相关的连贯运动，而生长在悬浮液中。当细胞迁移到液滴的上表面时，它们形成单层，并以漩涡和射流的方式集体移动。在所有浓度下，细菌速度的分布近似为瑞利分布，其平均值以非单调的方式依赖于浓度。其他动力学参数，如涡度和相关函数也进行了分析和比较，从同一菌株的杆状细菌。我们的研究结果表明，自推进球形物体确实形成了复杂的有序集体运动。这为细胞长宽比和细胞排列在自然界集体运动中的作用提供了一个新的视角。
A large variety of motile bacterial species exhibit collective motions while inhabiting liquids or colonizing surfaces. These collective motions are often characterized by coherent dynamic clusters, where hundreds of cells move in correlated whirls and jets. Previously, all species that were known to form such motion had a rod-shaped structure, which enhances the order through steric and hydrodynamic interactions. Here we show that the spherical motile bacteria Serratia marcescens exhibit robust collective dynamics and correlated coherent motion while grown in suspensions. As cells migrate to the upper surface of a drop, they form a monolayer, and move collectively in whirls and jets. At all concentrations, the distribution of the bacterial speed was approximately Rayleigh with an average that depends on concentration in a non-monotonic way. Other dynamical parameters such as vorticity and correlation functions are also analyzed and compared to rod-shaped bacteria from the same strain. Our results demonstrate that self-propelled spherical objects do form complex ordered collective motion. This opens a door for a new perspective on the role of cell aspect ratio and alignment of cells with regards to collective motion in nature.
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DOI：
10.1073/pnas.91.18.8631
发表时间：
1994-08-30
影响因子：
11.1
作者：
HARSHEY, RM;MATSUYAMA, T
通讯作者：
MATSUYAMA, T
影响因子：
56.9
作者：
Narayan, Vijay;Ramaswamy, Sriram;Menon, Narayanan
通讯作者：
Menon, Narayanan
DOI：
10.1073/pnas.82.24.8767
发表时间：
1985-12-01
影响因子：
11.1
作者：
BLACKHART, BD;ZUSMAN, DR
通讯作者：
ZUSMAN, DR
影响因子：
2.4
作者：
Cisneros, Luis H.;Kessler, John O.;Goldstein, Raymond E.
通讯作者：
Goldstein, Raymond E.
影响因子：
4.4
作者：
Copeland, Matthew F.;Flickinger, Shane T.;Weibel, Douglas B.
通讯作者：
Weibel, Douglas B.