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Latest Nitrogen fixation Stories

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2010-02-25 15:21:42

Novel species found to be more widely distributed in world's seas Marine scientists long believed that a microbe called Trichodesmium, a member of a group called the cyanobacteria, reigned over the ocean's nitrogen budget. New research results reported on-line today in a paper in Science Express show that Trichodesmium may have to share its nitrogen-fixing throne: two others of its kind, small spherical species of nitrogen-fixing cyanobacteria called UCYN-A and Crocosphaera watsonii, are also...

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2010-02-21 13:26:55

Flightless birds, blind cave shrimp, and other oddities suggest a "use it or lose it" tendency in evolution. In the microbial world, an unusual marine microorganism appears to have ditched several major metabolic pathways, leaving it with a remarkably reduced set of genes. This metabolic minimalist is a specialist uniquely suited to performing one very important function: taking nitrogen gas from the atmosphere and "fixing" it into a form that makes this essential nutrient available to other...

2010-01-14 20:07:45

It's not thinking in the way humans, dogs or even birds think, but new findings from researchers at the University of Tennessee, Knoxville, show that bacteria are more capable of complex decision-making than previously known. The discovery sets a landmark in research to understand the way bacteria are able to respond and adapt to changes in their environment, a trait shared by nearly all living things, and it could lead to innovations in fields from medicine to agriculture. In the long-term,...

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2009-12-14 07:36:19

An investigation by the University of Kansas' Adrian Melott and colleagues reveals a promising new method of detecting past comet strikes upon Earth and gauging their frequency It's the stuff of a Hollywood disaster epic: A comet plunges from outer space into the Earth's atmosphere, splitting the sky with a devastating shock wave that flattens forests and shakes the countryside. But this isn't a disaster movie plotline. "Comet impacts might be much more frequent than we expect," said Adrian...

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2009-11-20 08:25:07

Symbiosis between ants and bacteria explains how leaf-cutter ants dominate tropical environments Leaf-cutter ants, which cultivate fungus for food, have many remarkable qualities. Now there's a new one to add to the list: these ant farmers, like their human counterparts, depend on nitrogen-fixing bacteria to make their gardens grow. The findings, reported this week in the journal Science, document a previously unknown symbiosis between ants and bacteria, and provide insights into how...

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2009-11-02 13:40:00

Nitrogen fixation in the Atlantic Scientists including researchers from the National Oceanography Centre, Southampton and the University of Essex have discovered that interactions between iron supply, transported through the atmosphere from deserts, and large-scale oceanic circulation control the availability of a crucial nutrient, nitrogen, in the Atlantic. Their findings have potentially important implications for understanding global climate, both past and future. Nitrogen is an essential...

2009-07-07 11:06:54

Biologists know that when plants battle for sNitrogen research shows how some plants invade, take over otherspace, often the actual battle is for getting the nitrogen.Now, research at the University of Nebraska-Lincoln gives important new information on how plants can change "nitrogen cycling" to gain nitrogen and how this allows plant species to invade and take over native plants.In an article published July 6 in the scientific journal Proceedings of the National Academy of Sciences, UNL...

2009-06-23 09:34:05

An international collaboration of scientists has completed the genome sequencing of the Azotobacter vinelandii soil bacterium, U.S. researchers said. Scientists at the Virginia Bioinformatics Institute and Virginia Tech said the group's achievement uncovered important genetic information that will contribute to a more complete understanding of the biology of the soil-living bacterium. The work will also help advance research on A. vinelandii's role as a model study organism for investigation...

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2009-06-20 09:10:56

IFM-GEOMAR-biogeochemists feed Saharan dust to enigmatic fertilizer plankton The tropical Atlantic waters around Cape Verde are very low in plant nutrients.  Nitrogen is in especially short supply and limits the growth of the phytoplankton, the tiny plants that are at the basis of the food chain in the ocean. In this area, the nutrients fall out from the sky: Trade winds carry Saharan dust rich in iron and phosphorus which can fertilize the surface of the ocean.  This was one of the...

2009-06-17 15:44:40

 A collaboration of researchers, which includes scientists at the Virginia Bioinformatics Institute (VBI) and Virginia Tech, have completed the genome sequence of Azotobacter vinelandii, uncovering important genetic information that will contribute to a more complete understanding of the biology of this versatile, soil-living bacterium. The work will help advance research on A. vinelandii's role as a model study organism for investigation of nitrogen fixation and other biochemical...


Word of the Day
penuche
  • A fudgelike confection of brown sugar, cream or milk, and chopped nuts.
'Penuche' is a variant of 'panocha,' a coarse grade of sugar made in Mexico. 'Panocha' probably comes from the Spanish 'panoja, panocha,' ear of grain.
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