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Tag: "grow" at biology news

Psst! Coffee drinkers: Fruit flies have something to tell you about caffeine

...en are used as experimental organisms because they grow quickly and are easy to manipulate genetically. Now that Montell and his colleagues have a mutant fly that is unable to taste caffeine, they hope to further examine the other genes and molecules involved in the caffeine response and better understand...

Coral reefs are increasingly vulnerable to angry oceans

...they're young," said Connolly. "They also tend to grow and mature quickly, so the species can recover before the next big storm arrives." However, one effect of the increased production of greenhouse gases is an increase in the acidity of the ocean. This is likely to reduce the stability of coral r...

Fruit fly aggression studies have relevance to humans, animals

... in flies, in the constant environment in which we grow them, the environment is more important than the genes. But we are very interested in that small genetic contribution." Next, the researchers wanted to know which specific genes affect a fly's chances of becoming a bully. To find out, they conducted...

Batfish to the rescue!

...s it was completely gone and the coral was free to grow unhindered," Prof. Bellwood explains. The turnaround was due mainly to one species of batfish, Platax pinnatus, which is comparatively rare on the GBR and was thought to feed only on invertebrates. The event surprised the scientists in two ways...

Cancer stem cells linked to radiation resistance

...a "repair switch" that enables them to continue to grow unchecked, researchers at Duke University Medical Center have found. The researchers also identified a method that appears to block the cells' ability to activate the repair switch following radiation treatment. This finding may lead to the developm...

Buildup of damaged DNA in cells drives aging

... lacking a critical gene for repairing damaged DNA grow old rapidly and have physical, genetic and hormonal profiles very similar to mice that grow old naturally. Furthermore, the premature aging symptoms of the mice led to the discovery of a new t...

Researchers reveal mystery of bacterial magnetism

...the surface, where oxygen is scarce. (They do not grow well where oxygen is plentiful.) What makes them fascinating is that they naturally grow strings of microscopic magnetic particles called magnetosomes. When placed in a magnetic field, the...

Different strategies underlie the ecology of microbial invasions

...ology. Bacteria are not always so fortunate as to grow alone in their environment, and they often face competition from other lineages. One widespread solution is to kill these competitors. In the new work, the researchers explored the relative value to both invading and defensive bacteria of two dis...

A giant among minnows: Giant danio can keep growing

...ults of both species. The adult danio continued to grow during the 17-week trial and analysis of muscle fi...ached to the muscle fibers, telling these cells to grow and join to adjacent muscle fiber to repair the injury. There is also an application to fish farmi...

Disappearing nest egg: Researcher studying declining numbers of macaws

...ruit is to chop down the whole tree, and these can grow up to 100 feet high," Brightsmith confirms. "So nesting areas and food sources for macaws are being eliminated." Other prime macaw nesting grounds are being lost by logging and clearing the land for agriculture, he adds. Brightsmith will return t...

Winning by a neck -- Giraffes avoid competing with shorter browsers

...f the leaves at lower heights -- or if more leaves grow at higher levels. The researchers built low fences around trees in greater Kruger National Park to stop smaller browsers from eating leaves. After a complete growing season they found that the number of leaves on the fenced trees was roughly the ...

Study suggests evolutionary link between diet, brain size in orangutans

...issues, brain tissue is metabolically expensive to grow and maintain," she said. "If there has to be a trade-off, brain tissue may have to give." "The study suggests that animals facing periods of uncontrollable food scarcity may deal with that by reducing their energy requirement for one of the most ex...

How does a zebrafish grow a new tail?

...f a zebrafish loses a chunk of its tail fin, it'll grow back within a week. Like lizards, newts, and frogs.... By directing cell communication, these few cells grow into an organ or body part, in this case, a tail fin. "It is most likely the inability of humans ...

UGA scientists unravel 'molecular inch-worm' structure of walking-pneumonia bacterium

...y how organelles in these incredibly tiny bacteria grow and what their functions are. From a medical standpoint, however, they point the way to potential new drug targets and therapies to stop walking pneumonia and chronic bronchitis infections in their tracks. Since the organelle is involved in coloniz...

MIT creates 3-D scaffold for growing stem cells

...e eye of a needle. The researchers were able to grow a healthy colony of adult mouse stem cells on the ...searchers get a more accurate picture of how cells grow and behave in the body, the new synthetic structure can provide a more conducive microenvironment fo...

Stormy days ahead for coral reefs

...ey're young," says Dr Connolly. "They also tend to grow and mature quickly, so the species can recover before the next big storm arrives." However, one effect of the increased production of greenhouse gases is an increase in the acidity of the ocean. This is likely to reduce the stability of coral...

Better sludge through metagenomics

...d microbiologists have been trying for 35 years to grow this microbe, with no success," said Trina McMahon, Assistant Professor, Department of Civil and Environmental Engineering, University of Wisconsin, Madison, and one of the study's authors. "Remarkably, through metagenomic techniques, we were able to...

New finding points way to foiling anthrax's tricks

...adly bacteria steal iron from their human hosts to grow and reproduce. "Humans make a protein called si...derophores," are essential to anthrax's ability to grow rapidly, especially after the spores are inhaled, though why the bacteria need two siderophores to d...

UCSD study reveals how plants respond to elevated carbon dioxide

...e elevated carbon dioxide will stimulate plants to grow faster. The assumption is that plants will take up excess carbon dioxide to produce carbohydrates--their stored energy source. However, studies have shown that, contrary to expectations, increased carbon dioxide does not accelerate plant growth. Pr...

UGA scientists engineer root-knot nematode resistance

...eding on the roots' cells, they cause the roots to grow large galls, or knots, damaging the crop and reducing its yields. Working with assistant research scientist Guozhong Huang and research technician Rex Allen, Hussey discovered how to make plants resistant to root-knot nematode infection. Eric Davis...

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