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@ARTICLE{Beroz:866148,
author = {Beroz, Farzan and Yan, Jing and Meir, Yigal and Sabass,
Benedikt and Stone, Howard A. and Bassler, Bonnie L. and
Wingreen, Ned S.},
title = {{V}erticalization of bacterial biofilms},
journal = {Nature physics},
volume = {14},
number = {9},
issn = {1745-2481},
address = {Basingstoke},
publisher = {Nature Publishing Group},
reportid = {FZJ-2019-05344},
pages = {954 - 960},
year = {2018},
abstract = {Biofilms are communities of bacteria adhered to surfaces.
Recently, biofilms of rod-shaped bacteria were observed at
single-cell resolution and shown to develop from a
disordered, two-dimensional layer of founder cells into a
three-dimensional structure with a vertically aligned core.
Here, we elucidate the physical mechanism underpinning this
transition using a combination of agent-based and continuum
modelling. We find that verticalization proceeds through a
series of localized mechanical instabilities on the cellular
scale. For short cells, these instabilities are primarily
triggered by cell division, whereas long cells are more
likely to be peeled off the surface by nearby vertical
cells, creating an ‘inverse domino effect’. The
interplay between cell growth and cell verticalization gives
rise to an exotic mechanical state in which the effective
surface pressure becomes constant throughout the growing
core of the biofilm surface layer. This dynamical
isobaricity determines the expansion speed of a biofilm
cluster and thereby governs how cells access the third
dimension. In particular, theory predicts that a longer
average cell length yields more rapidly expanding, flatter
biofilms. We experimentally show that such changes in
biofilm development occur by exploiting chemicals that
modulate cell length},
cin = {ICS-2},
ddc = {530},
cid = {I:(DE-Juel1)ICS-2-20110106},
pnm = {553 - Physical Basis of Diseases (POF3-553)},
pid = {G:(DE-HGF)POF3-553},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:30906420},
UT = {WOS:000443584000029},
doi = {10.1038/s41567-018-0170-4},
url = {https://juser.fz-juelich.de/record/866148},
}