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Cohabitating-microbes

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Glowing Bacteria Control Squid Hosts

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Being jolted awake every morning by an alarm clock is plenty annoying, but at least that alarm doesn’t actually live in your body.

The Hawaiian bobtail squid (Euprymna scolopes) has an internal alarm clock that’s run by a species of glowing bacteria known as Vibrio fischeri. This bacterium and the squid are symbiotic, which means the two species live together for mutual benefit.

Now a recent study published in the journal mBio shows that V. fischeri are required for the squid’s daily circadian rhythm.

“There’s been a lot of work looking at how circadian rhythm in the host can affect symbiosis, but not many people have looked whether symbionts could affect the circadian rhythm in the host,” said study leader Elizabeth Heath-Heckman, a Ph.D. candidate in the lab of Margaret McFall-Ngai at the University of Wisconsin.

Click "source" to read more.

Journal article: http://mbio.asm.org/content/4/2/e00167-13.full
 
 

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