Titlebook: Nitrogen Fixation; Proceedings of the F M. Polsinelli,R. Materassi,M. Vincenzini Conference proceedings 1991 Springer Science+Business Medi

Provenance

A critical evaluation of the prospects for nitrogen fixation with non-legumesnd the use of atmospheric nitrogen to the most important agricultural plants, like cereals. Since then our understanding of the molecular biology of nitrogenase and the symbiotic interactions during root nodule formation and activity enable a reconsideration of these original speculations. Besides t

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dearth

Analysis of Nitrogenase Reaction Using Monoclonal Antibodies Against α-Subunit of Component I of ,mponents, component I and component II. Component I is a Fe-S protein containing Mo and is a tetramer(α.?.)- Component I catalysed the reduction of nitrogen with component II. Reduced component II gives electrons to component I with the consumption of ATP. The reaction mechanism fo nitrogenase is co

Debate

Involvement of GroEL in , gene expression and nitrogenase assemblyain. In ., overexpression of the . operon markedly accelerated the rate of appearance of Kpl and its constituent polypeptides after the start of derepression. NifA-dependent expression of β-galactosidase from the . promoter followed by an in-frame . fusion was threefold lower in the . mutant compare

nascent

The effect of some terrestrial oligochaeta on nitrogenase activity in the soilorms. The worms and casts were separately assayed for nitrogenase activity. The results indicated that nitrogenase activity was associated with gut content or body surface of worms and also their casts. Nitrogen fixation was also enhanced in soils enriched with enchytraeids in the presence of leaf l

Processes

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A Chromosomal Linkage Map of ,chniques have been employed. 1. Cotransfer of markers mediated by plasmids R68.45 and pJB3JI. 2. Isolation of R-prime derivatives of plasmid pJB3JI and analysis of markers included in the chromosomal fragment. 3. Polar transfer of chromosomal markers mediated by Tn5-Mob.

Alveoli

Fluctuation of the ARA under , Canopyen available at soil level. On the other hand, plants can influence the physiological activity of these microorganisms through the formation of microclimates by canopy effect and by means of organic material input. Thus, in the rhizosphere there are from 5–10 times more microorganisms than in the so

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The Influence of Root Exudates on Dinitrogen Fixation of Chosen Free-Living BacteriaThe cause of these differentiations in nitrogen fixation activity among plant species is probably the spcific composition of root exudates. Rovira (1956) showed that there are considerable quantitative and qualitative differences in the components excreted by the roots of plants growing under identi