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Tag: "flies" at biology news

Undergraduate research shows leaderless honeybee organizing

...ers stop using the vibration signal when the queen flies and leaves the nest with the swarm. Piping, however, continues in the swarm, as the bees need to make the queen fly again once a new nest site has been selected. “Drew Pierce did this project last summer,” Schneider explained. “We constructed ...

Penn researchers link cell's protein recycling systems

...egeneration.” Taylor and his group study fruit flies in which the proteasome is disabled by a genetic m...n we activated the autophagy system by feeding the flies a drug called rapamycin, neurodegeneration was prevented.” The accumulated misfolded proteins were c...

Exploring the dark matter of the genome

...tgun sequencing. Celniker says, "We grind up whole flies and produce libraries of DNA fragments of two size..., DNA was made three times from the same strain of flies -- in 1990, 1998, and 1999 -- and that new patterns of transposons were found in each. "We can see i...

For many insects, winter survival is in the genes

...be back to bug us come spring. A study of flesh flies and a handful of other insects suggests that they ...nly two such proteins that were activated in flesh flies during cooler weather. "Insects need heat-shock proteins in order to survive," said David Denling...

Salk scientists hammer out a pathway that promotes muscle cell survival in mice

...have SIK1, not just mice, and even worms and fruit flies use variations of the enzyme. And as Montminy adds, "Application of this same pathway over and over across species further emphasizes its importance."...

'Insulator' helps silence genes in dormant herpes virus

...ked enhancer activities in the eye tissue of fruit flies and in human cells in culture. "Based on these findings, we were able to identify this element as a kind of chromatin insulator that helps HSV-1 maintain a balance in its life cycle." The study also showed that HSV-1 chromatin is organized in a...

Corals -- More complex than you?

...se with fast generation turnover times ?like fruit flies ?shed genes particularly fast. Corals which take at least 5years to reach sexual maturity (compared with the laboratory fruitfly whose generation lasts only 3-4 weeks), and which have long and overlapping generation times, may thus be a living ‘muse...

New technique will produce a better chromosome map

...ublication in the journal Nature Methods. Fruit flies are well suited for chromosome studies because some of their cells contain gigantic, "polytene" chromosomes, each built up of more than 1,000 parallel copies of DNA strands. When stained, condensed, dark bands and lighter regions (interbands) give th...

Survival of the rarest: Fruit flies shed light on the evolution of behavior

...fied the benefit of rarity in populations of fruit flies with two different versions of the foraging gene. ...to more common strains of the virus. In this case, flies carry one of two versions of the foraging gene (either the "rover" or "sitter" type). Rover larvae m...

Sleepless for science: Flies show link between sleep, immune system in Stanford study

...iversity School of Medicine are finding that fruit flies can point to the answers. What they have learned ...and sleep disruption may be a two-way street: sick flies can't sleep, and losing sleep makes them more susceptible to infection. "When flies get sick, the...

Do fruit flies have free will?

... surprise: "I would have never guessed that simple flies who otherwise keep bouncing off the same window ha...ven the chance." The researchers tethered fruit flies (Drosophila melanogaster) in completely uniform white surroundings and recorded their turning behavi...

Detecting poisons in nectar is an odour-ous task for honeybees

...eptors as other animals of a similar size, such as flies and mosquitoes. This prompted scientists to think that perhaps honeybees had a reduced need to detect and learn about toxins, despite the fact that some floral nectar contains toxins. Work carried out by Dr Wright and colleagues suggests that honey...

Flies don't buzz about aimlessly!

...om have been pondering this very question. Fruit flies explore their environment using a series of straig... revealed how the flight patterns of starved fruit flies constitute an optimal scale-free searching strategy ?like the fractal patterns of a snowflake, a fly...

Researchers find link between food odors and lifespan in fruit flies

...asured the lifespans of different strains of fruit flies in the presence and absence of food odors ?specifi... diets. Exposure to food odors reduced lifespan in flies that had been subjected to dietary restriction. The reductions ranged from 6 percent to 18 percent ?...

Scientists find genes involved in the battle between Hessian flies and wheat

...orking with colleagues to learn more about how the flies feed and why they can't establish a feeding site o...and die. This is death by frustration." Hessian flies can be controlled by using specifically bred wheat varieties called resistant wheat cultivars. Infes...

Bisexual fruit flies show new role for neurochemical

...atherstone said. The gene mutation also made the flies bisexual, leading him to name the gene "genderblind." "The mutants are completely bisexual, but fertile. It's the first gene that really specifically affects homosexual behavior without affecting heterosexual behavior," he said. "Trying to unders...

Wheat can fatally starve insect predators

... The gene's role in creating resistance to Hessian flies was a surprise to U.S. Department of Agriculture and Purdue University researchers, discoverers of the gene and its function. They made the finding as they investigated new, long-term methods to protect wheat from insect damage. "This is a differe...

New molecular pathway could reveal how cells stick together

..." she said. Many tissues undergo remodeling as the flies grow and develop, but at least one, the breathing tubes, do not develop properly in the mutant flies. Page-McCaw calls it a "cellular adhesion defect that causes problems for the animal at the tissue level." Now she plans to find how ninjurin affe...

Is there a pilot in the insect?

...ne million neurons. When an insect, bird or pilot flies over land, the image of the ground below sweeps from front to back across the central part of the visual field, creating an "optic flow", which is defined as the angular speed at which the ground contrasts move past. By definition, this angular spee...

Bioluminescence at the service of a novel cerebral imaging technique

...longevity, because it has recently been shown that flies endowed with a mutation of the insulin receptor li...f the Drosphila to study and compare these maps in flies bearing different mutations, or in flies which serve as models for a variety of human pathologies, s...

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