title: Loss of collective motion in swarming bacteria undergoing stress.
abstract: The collective motion of Bacillus subtilis in the presence of a photosensitizer is disrupted by reactive oxygen species when exposed to light of sufficient dosages and is partially recovered when light irradiation is suspended. The transition from a highly collective to a more random motion is modeled using an improved self-propelled model with alignment rule. The increment in noise level describes the enhanced uncertainty in the motion of swarming bacteria under stress as observed experimentally.
authors.affiliation: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore.
authors.forename: Shengtao
authors.initials: S
authors.lastname: Lu
authors.forename: Wuguo
authors.initials: W
authors.lastname: Bi
authors.forename: Fang
authors.initials: F
authors.lastname: Liu
authors.forename: Xiangyang
authors.initials: X
authors.lastname: Wu
authors.forename: Bengang
authors.initials: B
authors.lastname: Xing
authors.forename: Edwin K L
authors.initials: EK
authors.lastname: Yeow
mesh_terms: D001412:Bacillus subtilis / Q000187:drug effects / Q000502:physiology* / Q000528:radiation effects; D008954:Models, Biological; D009038:Motion; D017319:Photosensitizing Agents / Q000494:pharmacology; D011524:Protoporphyrins / Q000494:pharmacology; D013312:Stress, Physiological
chemical_list: D017319:Photosensitizing Agents; D011524:Protoporphyrins; C028025:protoporphyrin IX