Caging dynamics in bacterial colonies - Kölner UniversitätsPublikationsServer

Hennes, Marc ORCID: 0000-0002-6592-9297, Cronenberg, Tom and Maier, Berenike ORCID: 0000-0001-6971-9927 (2022). Caging dynamics in bacterial colonies. Phys. Rev. Res., 4 (1). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2643-1564

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DOI:10.1103/PhysRevResearch.4.013187

Abstract

In colonies, bacteria are often densely packed due to strong attractive forces between neighboring cells. For organisms where aggregation is mediated by type 4 pili interactions, the pilus-mediated motor activity fluidizes these colonies, but it is unclear how close packaging affects bacterial motility. Here, we characterize the dynamics of single cells over five orders of magnitude in time. At short timescales, we find pilus-driven ballistic dynamics, which depending on the volume fraction of cells, transitions to caged or diffusive dynamics at intermediate timescales. Long-term dynamics are dominated by growth-induced radial motion overcoming caging at high packings. Reducing attractive interactions by antibiotic treatment delays caging and introduces long-ranged collective motion.

Item Type:

Journal Article

Creators:

Creators	Email	ORCID	ORCID Put Code
Hennes, Marc	UNSPECIFIED	orcid.org/0000-0002-6592-9297	UNSPECIFIED
Cronenberg, Tom	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Maier, Berenike	UNSPECIFIED	orcid.org/0000-0001-6971-9927	UNSPECIFIED