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. At the contrary, they express luciferase when they are highly concentrated in the photophore of Hawaiian bobtail squid.