Another new study takes a further step toward revealing the pervasive influence microbial communities that inhabit plants and animals have on their biology. Scientists in the US have discovered that the luminous bacterium Vibrio fischeri regulates the daily rhythm of its host, the Hawaiian bobtail squid, by interacting with its clock genes. Margaret McFall-Ngai, of the University of Wisconsin-Madison (UW-Madison), and colleagues, report how they discovered the symbiotic bacterium setting the biological clock of its host, in the 2 April online issue of the journal mBio...
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