Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore.
Phys Rev Lett. 2013 Nov 15;111(20):208101. doi: 10.1103/PhysRevLett.111.208101. Epub 2013 Nov 11.
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.
当受到足够剂量的光照时，枯草芽孢杆菌在光激活的光敏剂存在下的集体运动被活性氧所破坏，而当停止光照时，这种运动又会部分恢复。通过使用具有对齐规则的改进的自推进模型对从高度集体到更随机的运动的转变进行建模。噪声水平的增加描述了实验中观察到的应激状态下群体细菌运动的不确定性的增强。
