Our model is that flies like high local concentrations of carbon dioxide, says Scott. So if carbon dioxide is being produced by the yeast, flies taste it and they like it. But if there are increased global levels of carbon dioxide in the airsuch as if a food source becomes spoiled and potentially toxicthen flies are repelled by it. So we think by having these two different carbon dioxide detectors, flies are able to compare global to local levels of carbon dioxide and then regulate their behavior accordingly.
| Contact: Jennifer Wenger jwenger@mail.nih.gov 301-496-7243 NIH/National Institute on Deafness and Other Communication Disorders Source:Eurekalert |