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Nature's glowing slime: Scientists peek into hidden sea worm's light
Date:11/13/2013

yn, who added that green travels farthest and is therefore the easiest to detect in shallow coastal environments.

As for the light's ecological function, the researchers speculate that the luminous mucus may serve as a trap to attract prey, a deterrent to ward off certain unwelcome guests into the worm's living areas (the glowing mucus could stick to an intruder, making it more visible to its own predators), or possibly serve as a substance to build the worms' flaky, tube-shaped homes.

The blue color makes it intriguing and difficult to reconcile with a visual function for shallow animals only.

"However, one can imagine that blue light would work better if the predator is a fish coming from greater depths, or for specific predators for which we still don't know the visual sensitivity," concluded Deheyn.

In a separate study, Deheyn and his colleagues at Connecticut College found that riboflavin, known as vitamin B2 and used widely as a dietary supplement, is a key source of the light production. The study appearing in Photochemistry and Photobiology focused on worms collected by Scripps Marine Collector and Technician Phil Zerofski in the La Jolla submarine canyon off the coast of San Diego, California.

The research revealed riboflavin as the major fluorescent compound in all extracts of the worm's luminescent material, including the glowing slime. Although more investigation is needed, the authors hypothesize that a derivative of riboflavin serves as the emitting force in the worm's light-production process.

The authors note that the worms are not able to produce riboflavin on their ownonly plants and microbes cantherefore the worms must acquire the vitamin through a food source, the same way humans do.

"We have shown that the bioluminescent light production involves riboflavin, which is key because it means that the worm is relying on an external source," said Deheyn. "We suggest the light produc
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Contact: Mario Aguilera
scrippsnews@ucsd.edu
858-534-3624
University of California - San Diego
Source:Eurekalert

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