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Tag: "nematode" at biology news

Plants respond similarly to signals from friends, enemies

...obia and contrary to popular belief, the root-knot nematode signals plants from a distance and therefore does ...nals between plants and nematodes, even though the nematode provides no benefit to its host. Root-knot nematodes form feeding cells ?so-called giant cells ?in t...

Yale Scientists Find MicroRNA Regulates Ras Cancer Gene

...lecular, cellular and developmental biology on the nematode round worms, C. elegans. He found that these worms require let-7 RNA for normal development to occur. Without it, cells do not stop dividing and fail to differentiate into the normal structures of the worm ?instead they make an excess of their cells....

A bacterial genome reveals new targets to combat infectious disease

... the Wolbachia bacterium is so crucial to its host nematode that apparently eradicating it with antibiotics se...pipientis strain within Brugia malayi, a parasitic nematode responsible for lymphatic filariasis. This Wolbachia genome is small, only about a million base pai...

Opposing fat metabolism pathways triggered by a single gene

...d that when nhr-49 was absent, the lifespan of the nematode was reduced by more than 50%, and the animal displayed numerous gross abnormalities in the gut and gonad. This was accompanied by unusually high fat content in the larvae. They further showed that deletion of nhr-49 changed expression of 13 genes rel...

Signs of aging: Scientists evaluate genes associated with longevity

...anding of human aging. "Many processes involved in nematode aging may have fundamental and analogous roles in humans," Dr. Brooks-Wilson explains. "The human orthologs of some gene family members identified in this study have been associated with human age-related diseases." SAGE involves the isolation of sh...

Stealth Worms May Improve Insect Pest Control

...the pockets behind the bark of trees, the juvenile nematode waits for (or sometimes actively seeks) an unsuspe... natural openings - mouth, anus, spiracles. Or the nematode may enter the host directly by using a dorsal tooth. Once inside the insect, the nematode vomits th...

Alien woodwasp, threat to US pine trees, found in N.Y.

...eke. A biological control method using a parasitic nematode has been remarkably effective in other countries in the southern hemisphere where the woodwasp has been accidentally introduced, he says. Related World Wide Web sites: E. Richard Hoebeke: http://www.entomology.cornell.edu/Faculty_Staff/Hoebeke/ ...

Program finds lost genes in nematode genome

...bditis elegans (C. elegans). The genome of another nematode C. briggsae, was also used to determine which part...to many genomes, including those of mammals, other nematode species and most recently the fungus Cryptococcus neoformans. Brent's approach to gene prediction st...

Small worm yields big clue on muscle receptor action

...und in both humans and the much-studied laboratory nematode C. elegans which may open new pathways of research...ped a preparation for cutting open the microscopic nematode to record muscle responses when acetylcholine is applied. Using this preparation, Richmond was still...

Techniques available to detect soil that inhibits destructive soybean pest

...ayer of a soybean field plot effectively decreased nematode activity. In addition, they know that viability of...e soil or a cyst from a suppressive soil can lower nematode numbers," Westphal said. "We promote conditions in soil to suppress the nematode, and we also study ...

Evolutionary conservation of a mechanism of longevity from worms to mammals

Though the study of aging in the nematode model organism C. elegans has provided much insight into this complex process, it is not yet clear whether genes involved in aging in the worm have a similar role in mammals. In a recent study, Dr. Hekimi and colleagues of McGill University (Canada)...

Algal protein in worm neurons allows remote control of behavior by light

...n-algae gene into neurons of the tiny, transparent nematode C. elegans, researchers have been able to elicit specific behavioral responses by simply illuminating animals with blue light. The work paves the way for better understanding of how neurons communicate with each other, and with muscles, to regulate b...

DNA technique measures suitability of soil for onion crops

...developed a molecular technique to detect the stem nematode and white rot in soil samples. Agricultural labo...tional microscopic investigation for both the stem nematode and onion white rot. Each year thousands of soil samples are investigated for their suitability fo...

Researchers develop new method to help find deadly malaria parasite's Achilles heel

...our other well studied model organisms -- yeast, a nematode worm, the fruit fly, and a bacterium that causes digestive-tract ulcers in humans. The authors of the study, Trey Ideker, a professor of bioengineering at UCSD's Jacobs School of Engineering, and two graduate students, Silpa Suthram and Taylor Sittle...

Extinctions linked to climate change

... and sub-Arctic has modified the life cycle of the nematode parasites of musk oxen," the researchers said. "These worms can now complete their life cycle in one year, instead of two, and their rising numbers are having a significant impact on musk oxen survival." In a similar interaction, Blaustein said, the...

Worm hormone discovery may aid fight against parasitic disease

...Nature has used this system from the very simplest nematode worms up to humans, not only employing the same types of proteins to do the job, but also the same types of hormones." The dauer diapause occurs naturally in C. elegans when the worm senses from its environment that conditions are not favorable for ...

Newly identified protein complex sheds light on axon growth mechanism

...nderlying axon growth and synapse formation in the nematode worm C.elegans. In a study published today in the open access journal Journal of Biology, researchers have characterised a new protein, UNC-69, required for proper locomotion . They show that UNC-69 interacts with UNC-76 in a protein complex likely t...

Worm links cancer risk to ageing

...if they are damaged also determine lifespan in the nematode worm," explained Professor Gordon Lithgow, who carried out the work at The University of Manchester. "Our research has shown that these 'checkpoint proteins' ?thought only to operate in cells that divide ?function in cells that no longer divide as w...

UGA scientists engineer root-knot nematode resistance

...rop grown, about 2,000 plant species in all. The nematode invades plant roots, and by feeding on the roots' ...scovered how to make plants resistant to root-knot nematode infection. Eric Davis at North Carolina State University and Thomas Baum at Iowa State University a...

Bacterial protein shows promise in treating intestinal parasites

...treatments for hookworm and other soil-transmitted nematode infections, which are a major global health proble...ealth problem. "Our ability to control parasitic nematode infections with chemotherapy on a global scale is dependent on the availability of medicines that ar...

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