Results 171 to 180 of about 482,318 (212)
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A unifying framework for dinitrogen fixation in the terrestrial biosphere
Nature, 2008Dinitrogen (N(2)) fixation is widely recognized as an important process in controlling ecosystem responses to global environmental change, both today and in the past; however, significant discrepancies exist between theory and observations of patterns of N(2) fixation across major sectors of the land biosphere.
Benjamin Z, Houlton +3 more
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Divergent selection for dinitrogen fixation and yield in soybean
Theoretical and Applied Genetics, 1992Nitrogen fixation is generally considered to be a major parameter of productivity in soybean (Glycine max). The aim of the investigations reported here was to analyse the genetic behaviour of this trait in view of its possible use as an indirect criterion of selection for productivity.
N, Burias, C, Planchon
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Genetics of Dinitrogen Fixation
1981The only organism that has been used for the detailed analysis of the genes involved with dinitrogen fixation (nif genes) is Klebsiella pneumoniae. This organism is closely related to the well-studied Escherichia coli and Salmonella typhimurium. Unlike these latter species, certain K.
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The Biochemistry of Dinitrogen Fixation
1981Biochemical exploration of the metabolic pathway of dinitrogen reduction has produced a wealth of information, from which, to cope with the available space, only recent data pertinent to the enzyme itself will be presented. Developments until about 1975/1976 were discussed in detail at two occasions (Zumft and Mortenson, 1975; Zumft 1976) akin to many ...
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Energetics of microbial fixation of dinitrogen
1982I review metabolic sources of reductant and ATP used by nitrogenase for all known classes of metabolism occurring among N2-fixing organisms. The discussion centers on free-living organisms preferentially over symbionts. I quantify the amounts of substrate required and convert these to free-energy efficiencies; anaerobes are seen as efficient in this ...
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Dinitrogen Fixation Technologies for Alfalfa Improvement
Journal of Production Agriculture, 1989The energy crisis of the 1970s stimulated renewed research on the use of forage legumes as inexpensive sources of N in croping systems. New research programs were begun to improve the N assimilation of forage legumes, and to convert scientific knowledge about legume N2 fixation into technological choices that would support a profitable and sustainable ...
G. H. Heichel +3 more
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Fixation of Dinitrogen by Free-Living Microorganisms
CRC Critical Reviews in Microbiology, 1974AbstractThe purpose of this article is not to review exhaustively all that is known about nitrogen-fixing microbes but to provide a reasonable coverage of more recent discoveries in the field. It is primarily concerned with the microbiology of the free-living nitrogen-fixing organisms, although casual reference to symbiotic systems has been made.
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Calcium, Dinitrogen Fixation and Calmodulin in a Nostoc.
1991Four inhibitors of Calmodulin and other calcium binding proteins, have been used to probe the calcium mediated effects upon dinitrogen fixation, heterocyst frequency and the intracellular calcium content of Nostoc 6720. The inhibitors both enhance and depress dinitrogen fixation depending upon their concentration, but do not significantly affect the ...
L. A. Onek, P. J. Lea, R. J. Smith
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