Collective Motion of Spherical Bacteria
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 t...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3869797/ https://www.ncbi.nlm.nih.gov/pubmed/24376741 http://dx.doi.org/10.1371/journal.pone.0083760 |
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author | Rabani, Amit Ariel, Gil Be'er, Avraham |
author_facet | Rabani, Amit Ariel, Gil Be'er, Avraham |
author_sort | Rabani, Amit |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-3869797 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-38697972013-12-27 Collective Motion of Spherical Bacteria Rabani, Amit Ariel, Gil Be'er, Avraham PLoS One Research Article 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. Public Library of Science 2013-12-20 /pmc/articles/PMC3869797/ /pubmed/24376741 http://dx.doi.org/10.1371/journal.pone.0083760 Text en © 2013 Rabani et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Rabani, Amit Ariel, Gil Be'er, Avraham Collective Motion of Spherical Bacteria |
title | Collective Motion of Spherical Bacteria |
title_full | Collective Motion of Spherical Bacteria |
title_fullStr | Collective Motion of Spherical Bacteria |
title_full_unstemmed | Collective Motion of Spherical Bacteria |
title_short | Collective Motion of Spherical Bacteria |
title_sort | collective motion of spherical bacteria |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3869797/ https://www.ncbi.nlm.nih.gov/pubmed/24376741 http://dx.doi.org/10.1371/journal.pone.0083760 |
work_keys_str_mv | AT rabaniamit collectivemotionofsphericalbacteria AT arielgil collectivemotionofsphericalbacteria AT beeravraham collectivemotionofsphericalbacteria |