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  • Nitrogen fixation of and N transfer from cowpea, mungbean ...

    The high nitrogen fixation potential of groundnut in dual stands and its relatively low harvest index for N have apparently contributed to greater Nbenefical effect on the associated crop. ... (1979) Nitrogen fixation and transfer on tropical legumegrass swards in …

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  • Keeping the nitrogenfixation dream alive | PNAS

    Mar 21, 2017· The conversion of inert N2 gas to a metabolically tractable form, such as ammonia, is called nitrogen fixation. In biology, nitrogen fixation is a highly oxygensensitive process restricted to a select group of diverse microorganisms, often collectively referred to as diazotrophs, or “nitrogen eaters.” The sparse availability of fixed nitrogen, also known as fertilizer, has historically ...

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  • The search for the holy grail: nitrogen fixation in cereal ...

    Apr 25, 2014· Oldroyd is attempting to transfer the nitrogenfixing ability of peas and soybeans into cereal crops. ... Plant scientists who study nitrogen fixation caught a …

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  • Nitrogen fixation Wikipedia

    Nitrogen fixation is a process by which molecular nitrogen in the air is converted into ammonia (NH 3) or related nitrogenous compounds in soil. Atmospheric nitrogen is molecular dinitrogen, a relatively nonreactive molecule that is metabolically useless to all but a few microorganisms.

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  • 'Nitrogen Fixation,' in: Ullmann's Encyclopedia of ...

    Nitrogen Fixation BHASKAR S. PATIL, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology, Eindhoven, The Netherlands VOLKER HESSEL, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology, Eindhoven, The Netherlands LANCE C. SEEFELDT, Department of Chemistry and Biochemistry, Utah State University, Logan, UT, United …

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  • Use of plant colonizing bacteria as chassis for transfer ...

    efficiency of nitrogen fixation in P. stutzeri [49]. Characterizing these components in P. stutzeri, and defining a minimal unit for transfer of nitrogen fixation from P. stutzeri to P. protegens are important targets for nif transfer to aerobes. Transfer of N2fixation to cereals Geddes et al. 217

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  • The amounts and dynamics of nitrogen transfer to grasses ...

    Nitrogen fixation and transfer were assessed trough 15N dilution and difference methods. Results Both experiments confirmed significant differences between legumes regarding N transfer capacity. Although alfalfa cumulated twice as much biomass and fixed nitrogen, it transferred

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  • “Biological Nitrogen Fixation” Book Summary

    Biological Nitrogen Fixation Biological nitrogen fixation is one alternative to nitrogen fertilizer. It is carried out by prokaryotes using an enzyme complex called nitrogenase and results in atmospheric N 2 being reduced into a form of nitrogen diazotrophic organisms and plants are able to use (ammonia).

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  • Mechanism of Biological Nitrogen Fixation Biology Discussion

    ADVERTISEMENTS: Let us make an indepth study of the mechanism of biological nitrogen fixation. The biological nitrogen fixation is carried out by some bacte­ria, cyanobacteria and symbiotic bacteria. In symbiotic association, the bacterium provides fixed nitrogen (NH3) to the host and derives carbohydrates and other nutrients from the latter.

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  • Nitrogen fixation and transfer in intercrop systems ...

    Field Crops Research, 34 (1993) 335356 335 Elsevier Science Publishers , Amsterdam Nitrogen fixation and transfer in intercrop systems Stern Crop and Pasture Sciences, School of Agriculture, University of Western Australia, Nedlands, W..

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  • (PDF) Nitrogen fixation and transfer in grassclover leys ...

    Nitrogen fixation and transfer in grassclover leys under organic and conventional cropping systems Article (PDF Available) in Plant and Soil 371(1) · October 2013 with 364 Reads

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  • Quantitative exploration of the occurrence of lateral gene ...

    Jun 20, 2006· We explore quantitative assessments of these strategies to study the prokaryotic trait of nitrogen fixation, the enzymecatalyzed reduction of N2 to ammonia. Phylogenies constructed on nitrogen fixation genes are not in agreement with the treeoflife based on 16S rRNA but do not conclusively distinguish between gene loss and LGT hypotheses.

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  • BIOLOGICAL NITROGEN FIXATION IN SUGARCANE AND …

    Nitrogen fixation in sugarcane and nitrogen transfer from sugarcane to cassava 215 Institute, Guangxi Academy of Agricultural Sciences, and the nonN2 fixing reference cassava variety was HN8, provided by the Cash Crop Research Institute, Guangxi

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  • Nitrogen Fixation Flashcards | Quizlet

    Start studying Nitrogen Fixation. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

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  • Engineered Nitrogen Fixation: Expression in Plant ...

    As such, they do not need added nitrogen. The dream of biotechnology has been to move this capability into cereals so that they do not require added nitrogen. The challenge has been that nitrogen fixation requires the simultaneous transfer of many genes that must …

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  • Inoculation, Nodulation, Nitrogen Fixation and Transfer Dr ...

    Nitrogen Fixation and Transfer Nitrogen fixation is the conversion of atmospheric nitrogen to ammonium nitrogen in the presence energy (ATP) and the nitrogenase enzyme complex. The bacteria encode an enzyme complex called nitrogenase (MoFe, FeS protein), which is made up of Molybdenum, Iron, and Sulfur. This enzyme complex is actually responsible

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  • Nitrogenase Wikipedia

    Nitrogenase is an enzyme responsible for catalyzing nitrogen fixation, which is the reduction of nitrogen (N 2) to ammonia (NH 3) and a process vital to sustaining life on Earth. There are three types of nitrogenase found in various nitrogenfixing bacteria: molybdenum (Mo) nitrogenase, vanadium (V) nitrogenase, and irononly (Fe) nitrogenase.

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  • Nitrogenase an overview | ScienceDirect Topics

    Nitrogenase. Nitrogenase is a metalloenzyme system that plays a critical role in biological nitrogen fixation, and the study of how its metallocenters are assembled into functional entities to facilitate the catalytic reduction of dinitrogen to ammonia is an active area of interest.

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  • Nitrogen fixation by Alnus incana and nitrogen transfer ...

    Nitrogen fixation by alder and transfer of symbiotically fixed N from alder to pine was measured by 15 N‐dilution. Fixed N (mg) correlated with nodule biomass in both mycorrhizal and non‐mycorrhizal alders. On average, specific nodule activity over the two periods was 510 mg N fixed R' nodule d. wt. This was not affected by mycorrhizal ...

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  • What is nitrogen fixation Answers

    Nitrogen fixation is a biochemical process that transfer atmospheric nitrogen (N2) into NH3. The former is biounavailable, while the later one is bioavailable. There is no analogy process for ...

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  • Nitrogen Fixation Assimilation Flashcards | Quizlet

    Start studying Nitrogen Fixation Assimilation. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

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  • Nitrogen Fixation and Transfer in a Mixed Stand of Alfalfa ...

    Request PDF on ResearchGate | Nitrogen Fixation and Transfer in a Mixed Stand of Alfalfa and Bermudagrass | Information about dinitrogen (N2) fixation and transfer is …

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  • Nitrogen fixation and transfer in grassclover leys under ...

    Background and aim. Symbiotic dinitrogen (N 2) fixation is the most important external N source in organic objective was to compare symbiotic N 2 fixation of clover grown in organically and conventionally cropped grassclover leys, while taking into account nutrient supply gradients.

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  • Natural History of Nitrogen Fixation | Molecular Biology ...

    Mar 01, 2004· Abstract. In recent years, our understanding of biological nitrogen fixation has been bolstered by a diverse array of scientific techniques. Still, the origin and extant distribution of nitrogen fixation has been perplexing from a phylogenetic perspective, largely because of factors that confound molecular phylogeny such as sequence divergence, paralogy, and horizontal gene transfer.

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  • Nitrogen fixation and transfer in open ocean diatom ...

    Mar 31, 2011· Many diatoms that inhabit lownutrient waters of the open ocean live in close association with cyanobacteria. Some of these associations are believed to be mutualistic, where N 2fixing cyanobacterial symbionts provide N for the of N 2 fixation by symbiotic cyanobacteria and the N transfer to their diatom partners were measured using a highresolution nanometer scale …

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  • Nitrogen Fixation and Hydrogen Metabolism in Cyanobacteria ...

    Summary: This review summarizes recent aspects of (di)nitrogen fixation and (di)hydrogen metabolism, with emphasis on cyanobacteria. These organisms possess several types of the enzyme complexes catalyzing N2 fixation and/or H2 formation or oxidation, namely, two Mo nitrogenases, a V nitrogenase, and two hydrogenases. The two cyanobacterial Ni hydrogenases are differentiated as either uptake ...

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  • Biological Nitrogen Fixation and its Genetic Engineering ...

    ADVERTISEMENTS: This article provides a close look on biological nitrogen fixation and its genetic engineering. There are economic, environmental, and agronomic benefits from using BNF in cropping systems. All living things require nitrogen. It is a key element of amino acids, the building blocks of proteins. There is a huge reservoir of N in the […]

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  • Nitrogen Fixation | Texas AM AgriLife Research ...

    Nitrogen Transfer Forage legumes contain from 3 to 4% nitrogen that can come from both the soil and air. Legumes are generally grown with grasses in the hope that the legume will provide nitrogen for the grass and thereby eliminate or reduce the need for applied commercial nitrogen fertilizer.

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  • Nitrogen Fixation by Legumes California State University ...

    Within these nodules, nitrogen fixation is done by the bacteria, and the NH 3 produced is absorbed by the plant. Nitrogen fixation by legumes is a partnership between a bacterium and a plant. Biological nitrogen fixation can take many forms in nature including bluegreen algae (a bacterium), lichens, and freeliving soil bacteria.

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  • Biological nitrogen fixation in nonlegume plants

    Mar 10, 2013· Background. Nitrogen is an essential nutrient in plant growth. The ability of a plant to supply all or part of its requirements from biological nitrogen fixation (BNF) thanks to interactions with endosymbiotic, associative and endophytic symbionts, confers a great competitive advantage over nonnitrogenfixing plants.

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  • Horizontal transfer of the nitrogen fixation gene cluster ...

    Sep 10, 2009· Horizontal transfer of the nitrogen fixation gene cluster in the cyanobacterium Microcoleus chthonoplastes. Henk Bolhuis 1, Ina Severin 1, Veronique ConfuriusGuns 1, …

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  • Impacts of arbuscular mycorrhizal fungi on nutrient uptake ...

    Arbuscular mycorrhizal fungi (AMF) can play a key role in natural and agricultural ecosystems affecting plant nutrition, soil biological activity and modifying the availability of nutrients by plants. This research aimed at expanding the knowledge of the role played by AMF in the uptake of macro and micronutrients and N transfer (using a 15N stemlabelling method) in a faba bean/wheat ...

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  • The Nitrogen Cycle | Earth Science | Visionlearning

    Nitrogen fixation. Nitrogen fixation is the process wherein N 2 is converted to ammonium, or NH 4 +. This is the only way that organisms can attain nitrogen directly from the atmosphere; the few that can do this are called nitrogenfixing organisms.

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