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Nematode in Biological News

Computers aid in cracking deception in plants

... the soybean cyst nematode. The soybean cyst nematode is a small parasitic roundworm that infects the ... soybean plant. As part of its modus operandi, the nematode secretes proteins into the soybean that change ... it to create a specialized cell from which the nematode feeds. Scientists think molecular mimicry may be ...

Worm genome offers clues to evolution of parasitism

... they have decoded the genome of the worm, a tiny nematode called Pristionchus pacificus . "We found a ... estimate there are tens of thousands of nematode species. The worms are typically just one ... humans as well as animals and plants. One nematode in particular is well known in scientific ...

NC State researchers get to root of parasite genome

... co-director of the Center for the Biology of nematode Parasitism and the corresponding author on a ... so other researchers interested in the root-knot nematode - how it develops, establishes a host-parasite ... about the parasite. The northern root-knot nematode is the smallest multicellular animal genome ...

ISU researchers help map first plant-parasitic nematode genome sequence

... one of, if not the most important plant-parasitic nematode species across the world," said Thomas Baum, ... on which plant they attack," said Baum. "This nematode has a huge host range. For us nematologists, it ... "Also, because it is the first plant-parasitic nematode to have its sequence released, people are very ...

Caltech researchers find dual-use sexual attraction and population-control chemicals in nematodes

... found a rare kind of signaling molecule in the nematode worm Caenorhabditis elegans that serves a dual ... discovery offers hope for a solution to a global nematode scourge. Hundreds of thousands of nematode species occupy the earth, and many are pests or ...

Soybean varieties viable in southern Indiana, resistant to root-knot nematode

... verified that resistance in soybeans to one nematode parasite doesn't predict how well the plant will fight off another nematode species, said Andreas Westphal, assistant ... lines that will grow in Indiana and are root-knot nematode resistant," said Westphal, who is senior author ...

Ant parasite turns host into ripe red berry, biologists discover

... "It's just crazy that something as dumb as a nematode can manipulate its host's exterior morphology and ... that the red abdomen was full of hundreds of nematode eggs. "Like other ant biologists, I initially ... birds, the biologists quickly suspected that the nematode had found a unique way to guarantee its ...

Insight into the evolution of parasitism

... Ralf J. Sommer's department in Tbingen have shown that the genome of the nematode consists of a surprisingly large number of genes, some of which have ... have developed independently from one another. One member of the nematode group has acquired a certain degree of fame: due to its humble lifestyle, ...

Deep-sea species' loss could lead to oceans' collapse, study suggests

... species. In the new study, Danovaros team examined the biodiversity of nematode worms and several independent indicators of ecosystem functioning and ... life at the bottom of the sea. Earlier studies have also suggested that nematode diversity is a good proxy for the diversity of other deep-sea species. ...

New research to decode the genetic secrets of prolific potato pest

... being thrown at a parasitic worm less than 1mm long. The potato cyst nematode (PCN), Globodera pallida, attacks potato crops all over the world and is ... unique cell from which it feeds via a specialised tube. By doing this, the nematode stunts root growth and deprives the potato plant of essential nutrients, ...

Drug commonly used to treat bipolar disorder dramatically increases lifespan in worms

... nematode worms treated with lithium show a 46 percent increase in lifespan, raising ... to understanding how lithium works and highlights the utility of using the nematode C. elegans as a research subject in the field of pharmacogenetics. ...

Pinhead-size worms + robot = new antibiotics

... (a type of worm) infected with E. faecalis (a type of bacteria). That bacterium causes life-threatening infections in humans. C. elegans are tiny nematode worms that are widely used in scientific research. The tests identified 28 potential new drugs never before reported to have germ-fighting effects. ...

Restoring a natural root signal helps to fight a major corn pest

... roots. The substance attracts nematodes that attack and kill larvae of the Western corn rootworm, a voracious root pest. In field tests, the enhanced nematode attraction resulted in reduced root damage and considerably fewer surviving rootworms. Further fine-tuning of this natural defense strategy will ...

Nematode courting caught on camera

... Researchers studying the nervous control of nematode mating behavior have produced video footage of a male worm preparing to mate with a hermaphrodite. Writing in the open access journal BMC Biology , ...

SIRT1 takes down tumors

... will be published online April 13 ( www.jcb.org ) and will appear in the April 20 print issue of the Journal of Cell Biology . The yeast and nematode equivalents of SIRT1 are fountains of youth that stretch lifespan. Whether SIRT1 slows aging in mammals isn't certain, but it's beneficial in other ...

Parasite-resistant peppers green alternatives to chemical pesticides

... nematode-resistant varieties such as Charleston Belle and Carolina Wonder are viable alternatives to methyl bromide for managing southern root-knot nematode in bell pepper in sub-tropical environments. To increase the availability of parasite-resistant vegetables, commercial seed companies are currently ...

Genomics of large marine animals showcased in the biological bulletin

... in this virtual symposium have unexpectedly complicated sensory systems or immune systems that differ greatly from those of the fruit fly or the nematode worm, standard models in genetic studies. "I think there is good justification for these marine metazoan studies in that we will eventually apply ...

4 Stanford faculty named Howard Hughes Medical Institute Investigators

... connections. As a postdoctoral researcher at HHMI, Shan discovered that a particular protein played a critical role in how synapses form in the nematode worm C. elegans. He is now working on deciphering mechanisms of synapse formation in higher animals, in addition to continuing his work in nematodes. ...

UMass Medical School researcher Victor Ambros receives Gairdner Award, Franklin Medal

... role in gene regulation. microRNAs were originally discovered by Ambros and his lab in 1993 in the pathways controlling embryonic development in the nematode worm C. elegans, and at first seemed related only to a specific event in the worms development, and nothing more. Some years later, however, ...

Major scientific push to tackle agricultural productivity and food security in developing world

... subsistence farmers rely on. Scientists from the UK, India and Ghana will work to improve pearl millets genetic tolerance to drought. Fighting nematode worms with fungus - Root-knot nematodes are microscopic worms that feed on plant roots, stunting their growth and causing yield losses of US$70 ...

Purging the plantain pests in Africa

... cent of the daily calorific intake of Ugandans and many of Africas other poorest populations. But up to half of the plantain harvest is lost through nematode worms feeding on and damaging their roots. The Leeds researchers will work with colleagues from the International Institute of Tropical Agriculture ...

Washington University increases fleet of Roche Genome Sequencer FLX Systems

... day. As part of the early access program, the Genome Sequencing Center plans to resequence several strains of Caenorhabditis elegans, a small nematode that has been previously used as a genetic model organism. By sequencing several different strains of C. elegans, we will be able to not only ...

Gene discovery made easier with powerful new networking technique

... researcher Insuk Lee, used the gene network technique to identify new genes that regulate life span and are involved in tumor development in the nematode worm. In collaboration with Andrew Frasers group at The Wellcome Trust Sanger Institute, the researchers manipulated the newly found genes and ...

Overexcited neurons not good for cell health

... or other cells. Now a Northwestern University study reports that a mutation in a transcription factor that controls a neurotransmitter in the nematode C. elegans causes an imbalance in neuronal signaling that results in protein damage in target cells. Similar results and consequences on protein ...

Moss is a super model for feeding the hungry

... of a range of genomes is really important for scientific study. To help in understanding the human genome, scientists use the DNA of fruit flies, nematode worms and mice, to name only a few. We need that range in plant sciences too and Physcomitrella patens is a fantastic one to add to the list. ...

Scientists alter sexual orientation in worms

... University of Utah biologists genetically manipulated nematode worms so the animals were attracted to worms of the same sex part of a study that shows sexual orientation is wired in the creatures brains. ...

Mechanism for the in-vivo transport of siRNA

... established the technique of RNA interference, in which double-stranded RNA switches genes off efficiently and specifically. The scientists used the nematode (roundworm) Caenorhabditis elegans to study this. Subsequently, however, considerable problems arose in the attempt to transfer the strategy used by ...

One species' entire genome discovered inside another's

... was considered a rare anomaly except in very simple organisms. Bacterial DNA is very conspicuous in its structure, so if scientists sequencing a nematode genome, for example, come across bacterial DNA, they would likely discard it, reasonably assuming that it was merely contaminationperhaps a bit of ...

Unravelling new complexity in the genome

... genome sequencing projects is that humans have a comparable number of protein-coding genes as significantly less complex organisms such as the minute nematode worm Caenorhabditis elegans. Clearly something other than gene count is behind the genetic differences between simpler and more complex life forms. ...

Asexual worm quickly adapts to soil contamination

... lead to rapid genetic adaptations in the nematode Acrobeloides nanus. The worms from contaminated ... effects of pollution on the bacteria-eating nematode Acrobeloides nanus. This asexually reproducing nematode is easy to culture and study. The research is ...

Secret of worm's poison pill box protein could produce new natural insecticide

... of natural insecticides. It had been known that nematode worms can infect and kill insect pests with the ... uses a protein (XptA1) a toxin which helps the nematode to kill and feed on the dead body of the insect. ... from eating the body giving free reign to the nematode worms to consume it, multiply and move on. ...

UGA scientists engineer root-knot nematode resistance

... grown, about 2,000 plant species in all. The nematode invades plant roots, and by feeding on the roots' ... how to make plants resistant to root-knot nematode infection. Eric Davis at North Carolina State ... management tactic for preventing root-knot nematode damage and reducing growers' losses, he said, is ...

DNA technique measures suitability of soil for onion crops

... a molecular technique to detect the stem nematode and white rot in soil samples. Agricultural ... microscopic investigation for both the stem nematode and onion white rot. Each year thousands of ... crops. They are examined for the presence of the nematode Ditylenchus dipsaci (the stem nematode) and the ...

Techniques available to detect soil that inhibits destructive soybean pest

... of a soybean field plot effectively decreased nematode activity. In addition, they know that viability ... soil or a cyst from a suppressive soil can lower nematode numbers," Westphal said. "We promote conditions ... nematodes. Whether a field is tilled can affect nematode population density, but it's not yet known ...

Program finds lost genes in nematode genome

... elegans (C. elegans). The genome of another nematode C. briggsae, was also used to determine which ... animal genome to be sequenced, back in 1998. nematode researchers rely on a genome annotation database ... many genomes, including those of mammals, other nematode species and most recently the fungus Cryptococcus ...

Stealth Worms May Improve Insect Pest Control

... pockets behind the bark of trees, the juvenile nematode waits for (or sometimes actively seeks) an ... 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 the pathogen, which kills the host within ...

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 ... strain within Brugia malayi, a parasitic nematode responsible for lymphatic filariasis. This ... and cofactors, and probably depends on the nematode to supply them. One discovery of possible ...

Plants respond similarly to signals from friends, enemies

... and contrary to popular belief, the root-knot nematode signals plants from a distance and therefore does ... of NC State's Center for the Biology of nematode Parasitism and co-author of the paper. "Nematodes ... between plants and nematodes, even though the nematode provides no benefit to its host. Root-knot ...

Bacterial protein shows promise in treating intestinal parasites

... of more effective treatments for hookworm and other soil-transmitted nematode infections, which are a major global health problem in developing ... improve this global health problem. "Our ability to control parasitic nematode infections with chemotherapy on a global scale is dependent on the ...
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