Confinement-induced self-organization in growing bacterial colonies.

Abstract:

:We investigate the emergence of global alignment in colonies of dividing rod-shaped cells under confinement. Using molecular dynamics simulations and continuous modeling, we demonstrate that geometrical anisotropies in the confining environment give rise to an imbalance in the normal stresses, which, in turn, drives a collective rearrangement of the cells. This behavior crucially relies on the colony's solid-like mechanical response at short time scales and can be recovered within the framework of active hydrodynamics upon modeling bacterial colonies as growing viscoelastic gels characterized by Maxwell-like stress relaxation.

journal_name

Sci Adv

journal_title

Science advances

authors

You Z,Pearce DJG,Giomi L

doi

10.1126/sciadv.abc8685

subject

Has Abstract

pub_date

2021-01-22 00:00:00

issue

4

issn

2375-2548

pii

7/4/eabc8685

journal_volume

7

pub_type

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