Bacteria use collisions to navigate crowded environments, micro-maze experiments reveal
Some bacteria can sense when they bump into each other and use these interactions to shape how the group organizes and moves. This discovery reveals a new way microbes explore their environments using physical feedback rather than chemical signals.
Bacteria, despite being simple organisms, have discovered a clever way to navigate crowded environments and avoid getting trapped in large groups. This was revealed by experiments conducted at EPFL, where researchers observed how Pseudomonas aeruginosa bacteria interact with each other as they move. When these bacteria collide with their neighbors, they actively change direction within seconds, allowing the group to disorganize and become more mobile.
However, when the bacteria are at the edge of a growing colony, where there is open space, they become more aligned and move together towards unexplored territory. This discovery highlights how physical interactions can be used as a sensory mechanism to regulate collective behavior in bacteria. The ability to sense and respond to collisions enables bacteria to maintain collective organization when needed, while also allowing them to disperse and explore new areas when necessary.
This finding has implications not only for understanding bacterial behavior but also for developing new designs for robot swarms that need to navigate complex environments without getting stuck.
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