Self-organisation and convection of confined magnetotactic bacteria

Abstract Collective motion is found at all scales in biological and artificial systems, and extensive research is devoted to describing the interplay between interactions and external cues in collective dynamics. Magnetotactic bacteria constitute a remarkable example of living organisms for which mo...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Albane Théry, Lucas Le Nagard, Jean-Christophe Ono-dit-Biot, Cécile Fradin, Kari Dalnoki-Veress, Eric Lauga
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c8fc4107d8ae49a98da6eef63b47324a
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:c8fc4107d8ae49a98da6eef63b47324a
record_format	dspace
spelling	oai:doaj.org-article:c8fc4107d8ae49a98da6eef63b47324a2021-12-02T18:50:49ZSelf-organisation and convection of confined magnetotactic bacteria10.1038/s41598-020-70270-02045-2322https://doaj.org/article/c8fc4107d8ae49a98da6eef63b47324a2020-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-70270-0https://doaj.org/toc/2045-2322Abstract Collective motion is found at all scales in biological and artificial systems, and extensive research is devoted to describing the interplay between interactions and external cues in collective dynamics. Magnetotactic bacteria constitute a remarkable example of living organisms for which motion can be easily controlled remotely. Here, we report a new type of collective motion where a uniform distribution of magnetotactic bacteria is rendered unstable by a magnetic field. A new state of “bacterial magneto-convection” results, wherein bacterial plumes emerge spontaneously perpendicular to an interface and develop into self-sustained flow convection cells. While there are similarities to gravity driven bioconvection and the Rayleigh–Bénard instability, these rely on a density mismatch between layers of the fluids. Remarkably, here no external forces are applied on the fluid and the magnetic field only exerts an external torque aligning magnetotactic bacteria with the field. Using a theoretical model based on hydrodynamic singularities, we capture quantitatively the instability and the observed long-time growth. Bacterial magneto-convection represents a new class of collective behaviour resulting only from the balance between hydrodynamic interactions and external alignment.Albane ThéryLucas Le NagardJean-Christophe Ono-dit-BiotCécile FradinKari Dalnoki-VeressEric LaugaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-9 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Albane Théry Lucas Le Nagard Jean-Christophe Ono-dit-Biot Cécile Fradin Kari Dalnoki-Veress Eric Lauga Self-organisation and convection of confined magnetotactic bacteria
description	Abstract Collective motion is found at all scales in biological and artificial systems, and extensive research is devoted to describing the interplay between interactions and external cues in collective dynamics. Magnetotactic bacteria constitute a remarkable example of living organisms for which motion can be easily controlled remotely. Here, we report a new type of collective motion where a uniform distribution of magnetotactic bacteria is rendered unstable by a magnetic field. A new state of “bacterial magneto-convection” results, wherein bacterial plumes emerge spontaneously perpendicular to an interface and develop into self-sustained flow convection cells. While there are similarities to gravity driven bioconvection and the Rayleigh–Bénard instability, these rely on a density mismatch between layers of the fluids. Remarkably, here no external forces are applied on the fluid and the magnetic field only exerts an external torque aligning magnetotactic bacteria with the field. Using a theoretical model based on hydrodynamic singularities, we capture quantitatively the instability and the observed long-time growth. Bacterial magneto-convection represents a new class of collective behaviour resulting only from the balance between hydrodynamic interactions and external alignment.
format	article
author	Albane Théry Lucas Le Nagard Jean-Christophe Ono-dit-Biot Cécile Fradin Kari Dalnoki-Veress Eric Lauga
author_facet	Albane Théry Lucas Le Nagard Jean-Christophe Ono-dit-Biot Cécile Fradin Kari Dalnoki-Veress Eric Lauga
author_sort	Albane Théry
title	Self-organisation and convection of confined magnetotactic bacteria
title_short	Self-organisation and convection of confined magnetotactic bacteria
title_full	Self-organisation and convection of confined magnetotactic bacteria
title_fullStr	Self-organisation and convection of confined magnetotactic bacteria
title_full_unstemmed	Self-organisation and convection of confined magnetotactic bacteria
title_sort	self-organisation and convection of confined magnetotactic bacteria
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/c8fc4107d8ae49a98da6eef63b47324a
work_keys_str_mv	AT albanethery selforganisationandconvectionofconfinedmagnetotacticbacteria AT lucaslenagard selforganisationandconvectionofconfinedmagnetotacticbacteria AT jeanchristopheonoditbiot selforganisationandconvectionofconfinedmagnetotacticbacteria AT cecilefradin selforganisationandconvectionofconfinedmagnetotacticbacteria AT karidalnokiveress selforganisationandconvectionofconfinedmagnetotacticbacteria AT ericlauga selforganisationandconvectionofconfinedmagnetotacticbacteria
_version_	1718377531548106752

Self-organisation and convection of confined magnetotactic bacteria

Ejemplares similares