Team:Paris/Quorum sensing

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Presentation of the phenomenon of quorum-sensing

The Hawaiian bobtail squid have a symbiotic relationship with Vibrio fischeri

The phenomenon of quorum sensing was first discovered in Vibrio fischeri. This bacteria only expresses luciferase when the density of bacteria is very high (10¹¹bact/mL). Typically, the bacteria does not express bioluminescence when they are free living in the ocean. When they are highly concentrated in the photophore of Hawaiian bobtail squid, they express bioluminescence.