Secret Site Map
Thursday, May 28, 2015

Home News The Buzz Around Beer

The Buzz Around Beer

Flies

UC Riverside entomologists study why flies are attracted to beer and products of yeast fermentation.

| November 18, 2011

RIVERSIDE, Calif. – Ever wondered why flies are attracted to beer? Entomologists at the University of California, Riverside have, and offer an explanation. They report that flies sense glycerol, a sweet-tasting compound that yeasts make during fermentation.

“Insects use their taste system to glean important information about the quality and nutritive value of food sources,” said Anupama Dahanukar, an assistant professor of entomology, whose lab conducted the research. “Sugars signal high nutritive value to flies, but little is known about which chemical cues flies use for food sources that are low in sugar content – such as beer.”

Dahanukar’s lab examined the feeding preference of the common fruit fly for beer and other products of yeast fermentation, and found that a receptor (a protein that serves as a gatekeeper) that is associated with neurons located in the fly’s mouth-parts is instrumental in signaling a good taste for beer.

The receptor in question is Gr64e. Once a fly has settled on beer, Gr64e detects glycerol and transmits this information to the fly’s neurons, which then influences the fly’s behavioral response.

Dahanukar explained that flies use other receptors in their sensory organs to find food from a distance.

“Taste becomes important only after the fly makes physical contact with food,” she said. “A fly first locates food sources using its odor receptors – crucial for its long-range attraction to food. Then, after landing on food, the fly uses its taste system to sample the food for suitability in terms of nutrition and toxicity.”

Dahanukar, a member of UCR’s Institute for Integrative Genome Biology, explained that taste receptors also come into play when a female fly has to locate a suitable site for laying eggs.

“Females come to a decision after they have conducted intense probing of various potential sites,” she said.

Study results appeared online Nov. 6 in Nature Neuroscience.

Dahanukar was joined in the project by Zev Wisotsky, Adriana Medina, and Erica Freeman – all of whom work in her lab.

Wisotsky, a neuroscience graduate student and the first author of the research paper, performed the imaging, taste electrophysiology and behavior experiments. He was joined in his efforts by Freeman, a bioengineering graduate student, who performed the olfactory recordings; and Medina, a junior specialist in entomology, who performed the feeding preference experiments and molecular analysis.

The lab is poised now to move the research forward.

“How do you get information from the chemical environment to the brain – not just in flies but other insects as well?” Dahanukar said. “How is that information processed to give rise to appropriate behavior? How does feeding behavior change with hunger? These are some questions we would like pursue.”

The research project was supported in part by a Whitehall Foundation research grant to Dahanukar and a fellowship from the National Science Foundation Integrated Graduate Education Research and Training Program in Video Bioinformatics to Freeman.
 

Top news

Fastest Growing U.S. Cities in West And South, Census Bureau Reports

Most cities with populations above 100,000 in those regions grew significantly between 2000 and 2010, and 2010 and 2013, according to the bureau's report, which was released last week.

Nicotinoid and Fungal Disease Team up to Break Down Termites' Tough Defenses

Purdue University research shows that a small amount of nicotinoid pesticide substantially weakens termites' ability to fight off fungal diseases, a finding that could lead to more effective methods of pest control.

NPMA Announces PesTech³

The new conference, scheduled for Jan. 5-7, 2016, in Silicon Valley (San Jose, Calif.), focuses on technology solutions for pest management professionals.

ESA Announces New ACEs/BCEs for May 2015

The Entomological Society of America announced that seven industry professionals recently earned BCE or ACE credentials.

Industry Icon Blanton Whitmire Dies

Whitmire, whose contributions to the pest control industry include founding Whitmire Research Laboratories (a BASF legacy company) and developing the innovative “crack and crevice” aerosol technology, died on Sunday, at 97.

x