The catalysis of nitrogen reduction by extracts of nitrogen-fixing organisms requires an ATPgenerating system and a source of electrons (1, 2, 5, 11, 13). The phosplhoroclastic reaction provides botlh ATP anid electrons for the reduction of nitrogen by cell-free extracts of Clostridium1t pasteurianumn (2, 5, 13) and ferredoxin functions as the natural electron carrier from the phlosphoroclastic...

High-affinity vanadate transport systems have not heretofore been identified in any organism. Anabaena variabilis, which can fix nitrogen by using an alternative V-dependent nitrogenase, transported vanadate well. The concentration of vanadate giving half-maximum V-nitrogenase activity when added to V-starved cells was about 3 x 10(-9) M. The genes for an ABC-type vanadate transport system, vup...

Stable strains of mutants of Azotobacter that do not fix nitrogen are difficult to obtain by traditional procedures (Karlsson and Barker, 1948; Lindstrom, 1948). Stumbo and Gainey (1938) demonstrated that culturing Azotobacter on a high nitrate medium resulted in strains that failed to fix nitrogen even after continued transfer in the absence of fixed nitrogen. However, since these strains were...

We report the complete genome sequences of Azotobacter vinelandii mutant strain CA6 and its parent wild-type strain, CA. When fixing nitrogen, strain CA6 displays slow growth and impaired molybdate uptake, tolerance to tungstates, and production of hydrogen gas, compared to results for strain CA. Comparing these genome sequences may provide a genetic basis for these mutant phenotypes.

The aim of this research was to investigate the effect of inoculation (Azotobacter chroococcum and actinomycetes) and nitrogen mineral fertilizers (doses of 60 kg N ha-1 and 120 kg N ha-1) on the yield of wheat and on the number and activity of certain microorganisms in rhizospheric soil. The investigation was carried out in humogley soil with three wheat varieties. The variants of the experime...

Aims: To evaluate the effect of different nutrient management practices on growth, yield and attributes wheat.
 Study Design: Randomized Block Design (RBD).
 Place Duration Study: The experiment was conducted during Rabi season 2016-17 at Instructional Farm Acharya Narendra Deva University Agriculture & Technology, Nagar, Kumarganj, Ayodhya (U.P.)
 Methodology: consisting 10 ...

The low productivity of cucumber plants in Indonesia can be caused by several factors, one which is fertilization. Fertilization on Inceptisol soil has a nitrogen content needed to increase crop yields. use inorganic fertilizers limited avoid environmental pollution, so the biofertilizers an environmentally friendly option. purpose this study was determine effect concentration and interval appl...