... under circadian control, suggesting that appropriate timing of expression of these genes may be important for nodulation. There is also evidence for rhythmic gene expression of key nitrogen fixation genes in the rhizobium symbiont, and temporal coordination between nitrogen fixation in the bacterial...

... in the frame of sustainable agriculture. The nitrogen fixation takes place inside specialized nodules that are formed on the root or, in some cases, on the stems of the host plants. Nodule formation is induced by the rhizobia and involves a highly specialized signalling system, followed by morphological...

...Marcelo Bueno Batista; Ray Dixon Biological nitrogen fixation (BNF) is controlled by intricate regulatory mechanisms to ensure that fixed nitrogen is readily assimilated into biomass and not released to the environment. Understanding the complex regulatory circuits that couple nitrogen fixation...

... and nitric oxide reductase regulator)] have been studied previously in the context of the regulation of nitrogen fixation and denitrification. The gene expression of both fixK 1 and nnrR depends on FixK 2 , which acts as a key distributor of the ‘low-oxygen’ signal perceived by the two-component regulatory...

... Society 2006 dinitrogenase reductase activating glycohydrolase (DRAG) membrane association dinitrogenase reductase ADP-ribosylation transferase (DRAT) nitrogen fixation nitrogenase Rhodospirillum rubrum These two enzymes are encoded by genes that are within the same operon ( draT / draG...

...R. Little; I. Martinez-Argudo; R. Dixon The NifL regulatory protein is an anti-activator that tightly regulates transcription of genes required for nitrogen fixation in Azotobacter vinelandii by controlling the activity of its partner protein NifA through the formation of a protein–protein complex...

... nitrogen fixation nitrogen regulation P II regulatory proteins signal transduction The ammonium transport (Amt) protein family comprises a unique and ubiquitous group of integral membrane proteins found in the three domains of life. This family comprises the Amt/Mep proteins, found...

... 9 9 2004 © 2005 The Biochemical Society 2005 nitrogen fixation nodule plasmid Rhizobium sequencing symbiosis Table 1 Summary of the major characteristics of the sequenced Rhizobium sp. replicons Replicon Strain G+C (%) Nitrogen fixation genes...

... by nitrogenase, thus increasing the energy efficiency of the nitrogen fixation process. This review is focused on the genetics and biotechnology of the hydrogenase system from Rhizobium leguminosarum bv. viciae, a frequent inhabitant of European soils capable of establishing symbiotic association with peas...