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Abstract  

The application of biliometric methods and tools for analysing data from information sciences and patent data bases allow us to obtain different representations of an area that is particularly fragmented and difficult to interpret: plant biotechnologies in which nitrogen fixation has been particularly highlighted.

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Ruinen, J.: Nitrogen fixation in the phyllosphere. Pl and Soil 22 , 375 (1965). Nitrogen fixation in the phyllosphere. Pl and Soil 22

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of the acetylene-ethylene assay for measurement of nitrogen fixation. Soil Biol. Biochem. 5 , 47–81. Holsten R. D. Application of the acetylene-ethylene assay for measurement

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, M., Mertens, J., Smolders, E. (2004): A survey of symbiotic nitrogen fixation by white clover grown on metal contaminated soils. Soil Biol. Biochem. , 36 , 633–640. Smolders E

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Acta Agronomica Hungarica
Authors:
S. P. Saikia
,
S. P. Saikia
,
V. Jain
,
V. Jain
,
G. C. Srivastava
, and
G. C. Srivastava

Research over the last few years has shown that inoculation with nitrogen-fixing bacteria of the genus Azorhizobium presents an alternative for (or supplement to) chemical fertilization, mainly due to the capability of the bacteria to produce plant growth- promoting hormones. The Azorhizobium caulinodans strain ORS 571 in combination with 2,4-D was able to colonize the root interior of an Indian maize cultivar. After transplanting to pots, it was noticed that nodulated and Azorhizobium -treated plants showed higher chlorophyll content in the leaf and enhanced nitrate reductase activity, leading to higher yield as compared to the control plants (non-nodulated). A plant growth-promoting effect was clearly visible in all inoculated plants examined. nodulated plants treated with Azorhizobium had higher physiological activities as compared to plants treated only with Azorhizobium . Azorhizobium therefore creates potentially better symbiosis in the form of para -nodules and promotes a higher level of nitrogen fixation, leading to better growth and plant development, with reduced requirements for chemical fertilizers.

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Agrokémia és Talajtan
Authors:
Szandra Baklanov
,
Ágota Horel
,
Györgyi Gelybó
,
Eszter Tóth
,
Márton Dencső
,
Emese Ujj
, and
Imre Potyó

influencing nitrogen fixation and nitrogen release in biological soil crusts . In: Biological soil crusts: structure, function, and management , (eds. Belnap , J. & Lange , O.L. ). Springer Berlin Heidelberg , Berlin, Heidelberg . 241 – 261

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Acta Biologica Hungarica
Authors:
Imène Ben Salah
,
Nahida Jelali
,
T. Slatni
,
Margaret Gruber
,
A. Albacete
,
Cristina Martínez Andújar
,
V. Martinez
,
F. Pérez-Alfocea
, and
C. Abdelly

) Response of nitrogen fixation in relation to nodule carbohydrate metabolism in Medicago ciliaris lines subjected to salt stress. J. Plant Physiol. 166 , 477–488. Abdelly C. Response of

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Twenty cyanobacterial strains of the genus Tolypothrix, including 15 strains of T. tenuis, three strains of T. ceylonica, and one each of T. nodosa and T. bouteillei, that were collected from various agro-ecological regions of India were evaluated for important parameters related to nitrogen fixing potential, such as acetylene reduction activity, total protein and chlorophyll content. Distinct differences were observed in nitrogen fixing potential at both inter- and intraspecific levels. The T. tenuis strains, in general, exhibited superior nitrogen fixing ability as compared to strains belonging to other species. A statistical procedure based on simultaneous consideration of performances of various strains with respect to different parameters under study aided in identification of three highly promising T. tenuis accessions, namely ARM586, ARM75 and ARM460, for potential exploitation as biofertilisers.

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Vance, C. P., Heichel, G. H., Barnes, D. K., Bryan, B. J. W., Johnson, L. E. (1979) Nitrogen fixation, nodule development and vegetative regrowth of alfalfa ( Medicago sativa L.) following harvest. Plant Physiol. 64 , 1

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