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Why a bacterium got its curve -- and why biologists should know
Date:5/8/2014

he curved cells' colonization advantage.

These findings put some interesting boundaries on what is known about C. crescentus, starting with the upper limits of the current in which the organism can thrive, Gitai said. He and Persat also plan to pursue whether the bacteria are able to straighten out and cast offspring downstream when the home colony faces a decline in available nutrients.

At the same time, understanding why C. crescentus got its curve helps in figuring out the evolution of other bacteria, he said. Close relatives of the bacteria, for example, are not curved could it have to do with the severity of their natural environment, such as the powerful turbulence of an ocean? Harmful bacteria such as Vibrio cholerae, strains of which cause cholera, are curved, though the reason is unclear. It's possible this shape could be related to the organism's environment in a way that might help treat those infected by it, Gitai said.

Whatever the reason for a specific bacteria's shape, the Princeton research shows that exploring the influence of its natural habitat could be worthwhile, Gitai said.

"It was clear with C. crescentus that we needed to try something different," Gitai said. "People didn't really think of flow as a major driver of this bacteria's evolution. That really is a new idea."


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Contact: Morgan Kelly
mgnkelly@princeton.edu
609-258-5729
Princeton University
Source:Eurekalert  

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