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Tag: "symbiotic" at biology news

Plant hemoglobins: Oxygen handlers critical for nitrogen fixation

...d. The most conspicuous plant hemoglobins are the symbiotic hemoglobins of legumes; these hemoglobins accumula...gy have succeeded in eliminating the production of symbiotic hemoglobins in nodules of the model legume Lotus japonicus, enabling researchers to assess for the f...

Scientists discover unique microbe in California's largest lake

...lar structure of the new organism with that of the symbiotic formof Acaryochloris. Blankenship and Olson compar...ed its pigments withthose of A. marina, one of the symbiotic species."Chlorophyll d is a pigment that is intermediate between thechlorophylls found in the more p...

Sequencing of marine bacterium will help study of cell communication

...he-dark bacterium, Vibrio fischeri, which lives in symbiotic harmony within the light organ of the bobtail squi...e, "Complete genome sequence of Vibrio fischeri: A symbiotic bacterium with pathogenic congeners," by E. G. Ruby, professor of medical microbiology and immunolog...

Symbiotic bacteria protect hunting wasps from fungal infestation

Researchers have discovered a fascinating symbiotic relationship between a wasp species and a newly di...eat caused by bacteria and fungi is to establish a symbiotic relationship with innocuous antibiotic-producing bacteria that provide protection against the most d...

Stealth Worms May Improve Insect Pest Control

...n to focus on microscopic nematodes that live with symbiotic bacteria. "We study these nematodes -- which are actually insect killers -- not only to understand how diverse they are, but also to use them as biological control alternatives," says Patricia Stock, a nematomologist in the University of Arizona Coll...

Evidence of 600-million-year old fungi-algae symbiosis discovered in marine fossils

..." Now there is a new question. "We know that this symbiotic relationship was forged 600 million years ago or e...d divorce, he said. "Given the ease with which the symbiotic relationship is formed, I wouldn't be surprised if the land-based relationships formed independently...

Understanding how bacteria communicate may help scientists prevent disease

...d ("Complete genome sequence of Vibrio fischeri: A symbiotic bacterium with pathogenic congeners," by E. G. Ruby, M. Urbanowski, J. Campbell, A. Dunn, M. Faini, R. Gunsalus, P. Lostroh, C. Lupp, J. McCann, D. Millikan, A. Schaefer, E. Stabb, A. Stevens, K. Visick, C. Whistler, and E. P. Greenberg, published Fe...

New protein vital for immune response is found in surprise location

...n a host organism's cells, eventually developing a symbiotic relationship with host cells. Now that mitochondria are an integral part of our cells, Dr. Chen speculated that mitochondria may have acquired new functions by serving as a sentinel to detect invading pathogens and other stressful signals, ensuring t...

Deep sea buffet for bone-devouring worms

...ext by considering that the Osedax worms and their symbiotic bacteria can turn-over a large amount of organic carbon (one whale carcass may weigh up to 50 tons), approximately 2000 years faster than the usual mechanism of carbon deposition to the deep seafloor. The results of this study will aid understanding...

Researchers find how some antibiotics kill bacteria

...; and even some parasitic worms by eliminating the symbiotic bacteria parasites depend on. "It's the kind of drug the pharmaceutical business wants to produce," Artsimovitch said. "They're looking for the broadest range of antibiotics possible. Rifamycins would be ideal drugs if we could figure out how to get...

A bug's life: Exceptional genomic stability yet rapid protein evolution in a carpenter ant mutualist

...hat live inside insects. The scientists show that symbiotic bacteria have undergone exceptionally fast rates o...s of insects such as aphids and tsetse flies. Many symbiotic relationships are obligate; neither the bacterium nor its host can live without the other. Wernegre...

Health of coral reefs detected from orbit

... twice-weekly basis. Coral bleaching happens when symbiotic algae living in symbiosis with living coral polyps (and providing them their distinctive colours) are expelled. The whitening coral may die with subsequent impacts on the reef ecosystem, and thus fisheries, regional tourism and coastal protection. Co...

Plants, too, have ways to manage freeloaders

...that are not. The finding illustrates the complex symbiotic relationships that have evolved between organisms, ranging from one-sided parasitism to mutualism, a situation in which both parties benefit. It also suggests that agricultural practices, including heavy use of nitrogen fertilizer, could disrupt the...

Understanding the oceans microbes is key to the Earth's future

...he biogeography of these organisms, their roles in symbiotic relationships and pathogenesis, their metabolic capabilities, their impacts on humans, and goals for research, training, and education in marine microbiology. The report outlines a number of recommendations for future research in marine microbiolo...

Hot-spring bacteria flip a metabolic switch

...tions to this dilemma. For example, plants rely on symbiotic N2-fixing bacteria that live in their roots, far away from the photosynthetic leaves. A different type of cyanobacteria grows in multicellular strands and makes specialized N2-fixing cells called heterocysts that are walled off from the photosyntheti...

Minimal genome should be twice the size, study shows

...chnera and Wigglesworthia live inside insects in a symbiotic relationship where they provide essential molecules for their hosts in return for essential basic foods. Since evolving from E.coli, the Buchnera and Wigglesworthia genomes have lost some of the genes that they would otherwise need for survival. Us...

Tiny polyps gorge themselves to survive coral bleaching

...triggers a bleaching event. Once that happens, the symbiotic algae and the brown or green photosynthetic pigments inside are lost. The result is a "bleached" white coral. "In most cases, corals get 100 percent of their daily metabolic energy needs from the algae. Once they are gone, the coral polyp is left w...

Invasive species harms native hardwoods by killing soil fungus

...uspected that the invasive plant might thwart this symbiotic relationship. To test this possibility, they collected soil from five forests in Ontario dominated by four species of native hardwoods. First, the researchers tested seedlings' ability to form mycorrhizal relationships in soil with a history of gar...

Scientists seek to unwrap the sweet mystery of the sugar coat on bacteria

...hat surface sugars play in bacterial infection and symbiotic relationships. ...

Legume compounds may help cancer treatment

...molecules are produced by legumes during the early symbiotic relationship with soil bacteria known as rhizobia. Rhizobia induce legumes to form tiny new root organs called "root nodules." The bacteria live in the nodules and provide the plant with useable nitrogen it can convert into proteins. CILR Chief Inv...

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