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Tag: "defend" at biology news

Plants, animals share molecular growth mechanisms

... how cells respond to external stimuli so they can defend themselves against insect or fungal attacks," Szymanski said. A protein complex known as Actin Related Protein 2/3 (ARP2/3) is a cellular machine that controls formation of actin filaments, which are important for cell growth and movement. Actin fil...

Development of portable infectious disease detector

...l volume.(For more detail see "New device can help defend against novelbiological agents" at[http://exploration.vanderbilt.edu/news/news_microphys.htm].)Under the leadership of Franz Baudenbacher, assistant professor ofbiomedical engineering and physics, Vanderbilt researchers have furtherminiaturized this ...

Scientists discover how plants disarm the toxic effects of excessive sunlight

...t used to sense the presence of singlet oxygen and defend itself from this toxic substance. He notes that the response mechanism is likely highly conserved across species from microbes to plants and humans - and therefore very applicable to other fields of study. For example, too much sunlight can actually...

Defenseless plants arm themselves with metals

A group of plants that uses metal to defend against infection may do so because the normal defense mechanism used by most other plants is blocked. Purdue University researchers found that this group of plants produces, but does not respond to, the molecule that triggers the infection response...

UNC plant researchers discover proteins interact to form hair-trigger protection against invaders

...th in biology. "Plants use resistance proteins to defend themselves against pathogen attack by initiating a defense response," Holt said. "The proteins RAR1, HSP90 and SGT1 were previously thought to work together to help resistance proteins in this function. To our surprise, we found that SGT1 can actuall...

FDA approves more generic AIDS drugs

...th in biology. "Plants use resistance proteins to defend themselves against pathogen attack by initiating a defense response," Holt said. "The proteins RAR1, HSP90 and SGT1 were previously thought to work together to help resistance proteins in this function. To our surprise, we found that SGT1 can actuall...

Engineered molecule amplifies body's immune response

...leus to increase the expression of genes needed to defend the host against infection. A balance in the amount of Stat signaling caused by interferon is very important. "When interferon levels are too low, the host is highly susceptible to infection," explains Dr. Michael J. Holtzman of the Washington Univ...

Helping in a selfish world

...l individuals (helpers and breeders) co-operate to defend the young and the territory. The researchers combined behavioural observations with genetic analyses of relatedness in these fish groups and found that under specific ecological and demographic conditions unrelated individuals must "pay-to-stay" in t...

Study: Plants use dual defense system to fight pathogens

...etween two biochemical pathways that plants use to defend themselves against pathogens ?pathways that scientists have long believed worked independently of each other. Knowing how these pathways of immunity work may one day help researchers breed plants that can better resist a variety of pathogens, said D...

Purdue researchers find key to rice blast fungus

...the rice leaf cells, the infected cells attempt to defend the plant by dying. This means death for young plants, while in older plants, rice grain is lost. The biggest rice blast problem is in Asia and Latin America where rice is an important food staple. About two-thirds of the people in the world rely on...

New factor implicated in allergy and asthma attacks

...antigen-mediated" immune response the body uses to defend itself against viruses and bacteria. Now, though, researchers at the University of Texas Medical Branch at Galveston have discovered strong evidence that an additional factor is necessary to cause the severe respiratory inflammation involved in an a...

Sudden change in social status triggers genetic response in male fish, study finds

...ike that he's the top fish now and will vigorously defend his newly acquired breeding grounds. "We found t...rarchical social system where showy dominant males defend small territories that are used for courtship and breeding. However, dominance among male cichlids i...

K-State researchers study insects' immune system

...asite has to avoid the immune system or be able to defend against it. Understanding how a pathogen can survive might result in ways to disrupt the transmission of diseases, Kanost said. "Insects are the most abundant kind of animal," he said. "They're very successful animals. If you want to understand biol...

Underlying cause of massive pinyon pine die-off revealed

...nditions, the trees cannot make enough pine sap to defend themselves against the insects. "These trees are slow-growing trees, so we aren't going to have woodlands of this type back in this area for decades," Breshears said. He added that the lack of pinyon nuts will have negative effects on wildlife and o...

Envisat radar surveillance protects endangered prehistoric fish

...uced measures to limit illegal fishing in the EEZ, defend France's economic interests, protect ecosystems and stamp French sovereignty on their territorial waters. A surveillance system using French naval vessels has achieved some success, however the number of vessels fishing illegally continued to rise, a...

Genetic defenders protect crops from fungal disease

...provided us with the first insight into how plants defend against multiple pathogens." Once a powdery mildew infection takes hold, it covers the plant with fuzzy splotches, while sapping precious nutrients. At the cellular level, the fungal spores invade healthy plant cells and form root-like feeding struc...

PET imaging reveals the immune system at work

... deploys a complex network of specialized cells to defend the body. A malfunctioning immune system can cause such things as allergies, arthritis, cancer and AIDS as the body turns on itself. Current technology to assess immune response relies on invasive procedures such as biopsies to gather tissue that ca...

Jefferson biologist coaxing human embryonic stem cells to make dopamine with simpler, faster method

... deploys a complex network of specialized cells to defend the body. A malfunctioning immune system can cause such things as allergies, arthritis, cancer and AIDS as the body turns on itself. Current technology to assess immune response relies on invasive procedures such as biopsies to gather tissue that ca...

Sea slug mixes chemical defense before firing at predators

When threatened by predators, sea slugs defend themselves by ejecting a potent inky secretion int...cape." Aplysia employs a variety of mechanisms to defend against predators. Its secretion stimulates feeding behaviors in spiny lobsters, but deters these be...

Animal models show that anabolic steroids flip the adolescent brain's switch for aggression

...heir cages. Normally mild-mannered hamsters still defend their turf, learning aggression during puberty by play-fighting, much like humans. Their roughhousing normally includes wrestling and nibbling ?pretty tame stuff. However, hamsters injected with commonly used steroids (suspended in oil) became ex...

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