Results 161 to 170 of about 465,287 (202)
Some of the next articles are maybe not open access.
Detection of Intermediates in Chemical N2 Fixation
1985It has been suggested that the biological reduction of N2 involves, after N2 binding, a series of six electron-proton transfer steps (Thorneiey, Lowe, 1984). No nitrogen-hydride intermediates have been identified in any biological system. However, indirect evidence has led to the following proposed intermediates: (1) diazene-level(N2H2) intermediate ...
T. Adrian Georg, Robert C. Tisdale
openaire +1 more source
Inheritance of N2 fixation efficiency in cowpea
Euphytica, 1986Host plant genetics of N2 fixation in the cowpea (Vigna unguiculata (L.) Walp.) — Rhizobium symbiosis was investigated in the field with a mixed strain inoculum and in the greenhouse with a single strain inoculum. Five cowpea genotypes, including ‘H-Brown Crowder’ and ‘L-Bush Purple Hull’, were used to generate populations for genetic studies.
J. C. Miller +2 more
openaire +1 more source
N2 Fixation and Photosynthesis in Microorganisms
1979The inter-relationships between N2 fixation and photosynthesis, particularly in agriculturally important legumes, has for long attracted attention (see Wilson, 1940; Quispel, 1974; Burns and Hardy, 1975; Nutman, 1976; Hardy, 1977; Pate, 1977). In legumes and in other symbiotic systems, except those involving blue-green algae (see Fogg et al., 1973 ...
openaire +1 more source
Photosynthate Limitation of Symbiotic N2 Fixation
1981For the past several years our laboratory has studied various aspects of the energetics of nitrogen fixation, experiments leading to the conclusion that there is a high metabolic energy cost for this process (1). Several of these experiments will be discussed below (see Figs. 1 and 4 for integration of this work).
K. Andersen +4 more
openaire +1 more source
Contribution of N2 Fixation for the World Agriculture
2012Plant production of high quality as well as the availability of foods rich in protein is crucially dependent on nitrogen. Tropical agricultural soils often have impaired production due to limited availability of nitrogen, which leads to use of nitrogen fertilizers and alternative resources such as biological nitrogen fixation (BNF). The latter has been
André Luís Braghini Sá +3 more
openaire +1 more source
H2 metabolism in photosynthetic bacteria and relationship to N2 fixation
Annales de l'Institut Pasteur / Microbiologie, 1983The photosynthetic bacteria can evolve H2 in the light through a nitrogenase-mediated reaction. The nitrogenase enzyme in the photosynthetic bacteria is similar to other nitrogenases. It is made of two soluble components: a) the Fe protein (dinitrogenase reductase or Component II) which receives electrons from ferredoxin, and b) the Mo-Fe protein ...
J C, Willison +3 more
openaire +2 more sources
N2-Fixation by chemoautotrophic hydrogen bacteria
Archives of Microbiology, 1974The Gram-positive coryneform bacteria strains 14g and 7C were found to be able to grow with N2 as sole nitrogen source when incubated under microaerobic conditions. Nitrogenase activity in whole cells was assayed by acetylene reduction. High rates of ethylene production (50–120 nmole/hxmg cell protein) were observed in N2 or glutamate grown cell ...
Gogotov, J.N., Schlegel, H.G.
openaire +3 more sources
Breeding Legumes for Improved N2-Fixation
1984The earth’s atmosphere is approximately 78% nitrogen in elemental (N2) form. Although nitrogen is required by plant and animal life for synthesis of protein and other essential molecules this gaseous form is unavailable to eukaryotic organisms. In general, plants require ammonia (NH2) or nitrate (NO3 -) sources of nitrogen as a major nutrient. Animals,
G. R. Smith, W. E. Knight
openaire +1 more source
Physiology and Biochemistry of N2-fixation by Cyanobacteria
1984Aspects of the subject have recently been reviewed by several authors (Stanier, Cohen-Bazire 1977; Haselkorn 1978; Stewart 1980; Hawkesford et al. 1983; Wolk 1982; Bothe et al. 1980; Bothe 1982; Neuer et al. 1983). Therefore newer findings, published in the last two years, will preferentially be discussed in the present communication.
H. Bothe +4 more
openaire +1 more source