Sentences with phrase «nitrogen fixation in»

Assisted a Ph.D. of Agricultural Microbiology with collecting data on nitrogen fixation in corn and soybean plots.

Many gardeners, however, find it well worth the trouble to grow: just like all other legumes, astragalus has the ability to promote nitrogen fixation in the soil, thus enhancing its natural fertility.

Iron and phosphorus co-limit nitrogen fixation in the eastern tropical North Atlantic.

Diazotroph diversity and nitrogen fixation in the coral Stylophora pistillata from the Great Barrier Reef — Michael P. Lesser — The ISME Journal

There have been many claims of nitrogen fixation in plants outside nodules where it was known to occur for more than a century.

This research, «Robust biological nitrogen fixation in a model grass - bacterial association,» was published in the March 2015 issue of the Plant Journal.

Based on the abundance of these cyanobacteria and the rate at which they gobble down radioactive nitrogen in the laboratory, the researchers estimate they account for about 10 % of nitrogen fixation in the ocean.

His area of research — nitrogen fixation in legume plants — interested me, and his enthusiasm for his subject was inspiring.

Not exact matches

The ban on synthetically - produced mineral nitrogen in organic agriculture confines the productivity to the natural system limits (i.e. N - fixation) or the limits defined by the annual nutrient balance of the farm, including imported fodder and organic fertilizers.

«It has been established that the nitrates, which is a form of nitrogen, comes from fixation of atmospheric diatomic nitrogen in the atmosphere during meteorite impacts, which is consistent with the data that we obtained through the SAM analyses, so this may be the main source of fixed nitrogen on Mars,» says Javier Martín - Torres.

New research shows that as taller shrubs expand into the tundra, nutrients in their leaf litter will either promote or reduce the nitrogen fixation, depending upon which shrub species that will dominate.

Nitrospinae bacteria, which use the nitrogen compound nitrite to «fix» inorganic carbon dioxide into sugars and other compounds for food and reproduction, are responsible for 15 to 45 percent of such carbon fixation in the western North Atlantic Ocean, researchers report in the...

And it is known that fixation of nitrogen from the air is in the tundra to a high degree performed by cyanobacteria associated with mosses.

Fixation processes free up nitrogen atoms from their diatomic form to be used in other ways, but nitrogen does not easily react with other chemicals to form new compounds.

Nitrogen fixation is where nitrogen (N2) in the atmosphere is converted into ammonia (NH3).

They focus on modifications with nitrogen, developing a technique with direct nitrogen fixation, carbon - nitrogen bond formation, at the broken edges of graphite frameworks using ball - milling graphite in the presence of nitrogen gas.

Nitrogen fixation is something that needs to happen in an anaerobic environment, and so when you break the crust up, you aerate it, and when you aerate it then the nitrogen fixation basically stops.

Applications considered in the process included bio-mining; nitrogen fixation by engineered crops; gene drive propagation in populations of invasive species; and engineered seeds and plants destined for distribution to the public.

The process is called nitrogen fixation, and it occurs in microorganisms on the roots of plants.

Thus, in addition to the so - called «Haber - Bosch process of nitrogen fixation,» nitrogenase also stimulates a reaction corresponding to the «Fischer - Tropsch synthesis of hydrocarbons,» which can be used on a large scale to synthesize fuels, for instance from industrial waste gases..

Under the tutelage of geneticist Frederick Ausubel, Ruvkun earned a Ph.D. in microbial genetics in 1982 by figuring out how to knock out nitrogen - fixation genes in Rhizobium meliloti, a bacterium that has a symbiotic relationship with alfalfa.

For more than a decade, a lone researcher has been building a case for nitrogen fixation by bacteria living in poplar leaves.

Ocean acidification slows nitrogen fixation and growth in the dominant diazotroph Trichodesmium under low - iron conditions.

Their analysis, which could discern human - derived nitrogen from natural nitrogen fixation, revealed that the oceanic nitrate concentration increased significantly over the last 30 years in surface waters of the North Pacific due largely to the enhanced deposition of nitrogen from the atmosphere.

Elevated CO2 enhances nitrogen fixation and growth in the marine cyanobacterium Trichodesmium.

And if the cyanobacteria are growing in water short on iron, an essential nutrient for them, the slowdown in nitrogen fixation can overwhelm any positive growth effects from extra CO2.

In soy and other legumes nitrogen fixation is an evolved trait allowing them to hold on to the element and return it to the soil.

Marilyn Roossinck of Pennsylvania State University, University Park, spoke with Sarah Crespi about the diversity of roles that viruses take on in ecological systems, from protecting plants from drought to moderating nitrogen fixation.

Hence, increasing nitrogen fixation could improve overall plant productivity for farmers who grow legumes in both industrial and developing countries while diminishing or eliminating the need for nitrogen fertilizers.

«Fifty - four percent of that is fertilizer — the Haber - Bosch process; 11 percent is atmospheric deposition — the plus side of pollution; 18 percent is in situ fixation,» or nitrogen - fixing cover crops, like legumes, Sanchez said.

Nanoscience has a role in understanding how those microbes talk to plants, how they share metabolites, and what regulates nitrogen fixation.

Possible mechanisms include (iv) fertilization of phytoplankton growth in the Southern Ocean by increased deposition of iron - containing dust from the atmosphere after being carried by winds from colder, drier continental areas, and a subsequent redistribution of limiting nutrients; (v) an increase in the whole ocean nutrient content (e.g., through input of material exposed on shelves or nitrogen fixation); and (vi) an increase in the ratio between carbon and other nutrients assimilated in organic material, resulting in a higher carbon export per unit of limiting nutrient exported.

The analysis focused on the genes involved in nitrogen fixation and the formation of heterocysts, which are special cells where atmospheric nitrogen is converted into ammonia.

«More than 60 genes involved in various processes of heterocyst formation and nitrogen fixation were assigned to the chromosome based on their similarity to the reported genes,» Kaneko's team writes in Genome Research.

«If all plants could do what legumes can do, then we wouldn't need nitrogen fertilizer and we would solve these problems,» said Frugoli, whose lab at Clemson works to understand the signaling between the plant and bacteria in the nitrogen fixation relationship.

He is specialized in the ecology and diversity of cyanobacteria, other marine bacteria and microalgae, and known for his work on microbial mats and nitrogen fixation

Pulse crops such as lentils are also environmentally sustainable in that they participate in nitrogen fixation through a symbiotic relationship with Rhizobium soil bacteria, which improves nutritional quality and yield of subsequent crops when used as a rotation crop (Migliozzi et al., 2015).

Although nitrogen fixation is not just a gift of life — it has been estimated that 100m people were killed by explosives made with industrially fixed nitrogen in the 20th century's wars — its net effect has been to allow a huge growth in population.

Ppt on spiritual leadership model Ppt on nitrogen cycle and nitrogen fixation examples Download ppt on reduce reuse recycle Ppt on floppy disk Ppt on earth hour san francisco Ppt on latest gadgets used at home Ppt on water activity in food Ppt on renewable energy resources in india Ppt on conservation of natural vegetation and wildlife Ppt on avalanche photodiode detector

The cyanobacteria tested in the laboratory tank are believed to be responsible for about half of all marine nitrogen fixation.

Limited direct impacts of atmospheric CO2 on nitrogen - fixation have been found in soil biological crusts (Billings et al., 2003), but soil microbial activity beneath shrubs has been observed to increase, thus reducing plant - available nitrogen (Billings et al., 2002).

Also, the impact of biological nitrogen fixation on N2O emissions is important in assessing the impact of cropping system changes.