Effect of cellular and environmental conditions on bacterial collective oscillation

Collective oscillation in biology is ubiquitous and often arises from coupling between individual oscillators in phase space. Previously, we discovered a novel type of collective oscillatory motion in bacterial suspensions, which arises from weak synchronization and diffusive coupling between random trajectories but does not require individual oscillators. However, it is unclear what determines the intrinsic oscillation frequency in the system. Here we manipulate the cellular and environmental conditions to systematically to identify potential factors controlling the oscillation frequency. Our results will provide necessary information to fully understand the collective oscillatory motion and suggest new directions for active matter engineering.