The objectives of this study were to count and culture Azotobacter spp. in sampled soils, to determine the nitrogen (N) fixing capacity byAzotobacter spp. in pure culture and different soils, and to explore the relationships between N fixation capacity of Azotobacter spp. and microbiological properties of soils in Northern Anatolia, Turkey. Statistically significant relationships were found bet...

Methods employed in the study of the fluorescent culture filtrates of Azotobacter are described. The use of a fluorescence meter in the characterization of the fluorescent substances elaborated by Azotobacter agile, Azotobacter vinelandii, and Azotobacter macrocytogenes n. sp. is discussed. A. macrocytogenes, a fluorescent species, is included with the two previously reported fluorescent Azotob...

Stevenson, L. H. (Louisiana State University, Baton Rouge), and M. D. Socolofsky. Cyst formation and poly-beta-hydroxybutyric acid accumulation in Azotobacter. J. Bacteriol. 91:304-310. 1966.-The relationship between cyst formation and the accumulation of poly-beta-hydroxybutyric acid (PHB) in Azotobacter vinelandii (A. agilis) was investigated. After various periods of growth, the cells were h...

Although the terminal respiratory chain of Azotobacter has been the subject of several recent studies, the nature of the cytochrome oxidase portion is still somewhat obscure. Repaske (1) partially purified and characterized a soluble succinic dehydrogenase and succinoxidase system from Azotobacter z&elan&i. Wilson and Wilson (2) studied the soluble succinoxidase in Repaske’s preparation and dem...

The flavoprotein from Azotobacter, first isolated by SHETHNA et al. 1, is chemically well characterized, but its enzymatic function is still obscure. ARNON and coworkers 2 found this flavoprotein to be active in substituting for ferredoxin in the reduction of acetylene by a cell-free nitrogenase preparation from Azotobacter. We have recently confirmed their observation3. In addition, we could d...

The present work was conducted to find out the effect of biofertilizer formulated with four species of bacteria (two species of Azotobacter and two species of Lysobacter) and zinc sulphate. Field experiments with mustard plant were conducted to study the effectiveness of soil application of zinc sulphate and biofertilizer at 0, 10, 20, 30, 40, 50 days after sowing. Plant height and condition of...

to evaluate the effects of plant growth promoting rhizobacteria (pgpr) such as azotobacter chroococcum, azospirillum lipoferom and brasilence and pseudomonas fluorescens and nitrogen fertilizer from urea source on yield and yield components of maize (zea mays l.) double cross hybrids (dc 370), a field experiment was carried out in a factorial experiment (5*3) in rcbd with 4 replications. bacter...

azotobacter is a gram negative, aerobe, chemo-organotroph with the, polymorphism including rod, cocci and ovoid forms. this bacterium belongs to gama-proteobacteria class, pseudomonaceae family with 7 species. it cannot produce spores but forms cyst. azotobacters’species lives in different regions from tropicals to poplars in ph 3-9. however, it can be fined mainly in alkaline and natural soils...

Ten Azotobacter cultures were isolated from the maize rhizosphere and their auxin producing ability was measured colourimetrically. The auxin production by three efficient Azotobacter cultures (Z1, Z3, Z4) was also measured in the presence of filter sterilized L-tryptophan (at 10G, 10G and 10G M). Azotobacter culture Z4 gave relatively higher auxin production and was selected for further experi...

This experiment was lay out in order to evaluate the effects of different biofertilizers on seed yield, protein and oil of rapeseed in Iran. The experiment was a factorial design with three replications. Treatments were four nitrogen biofrtilizers (control (N1), Nitroksin (N2), Azotobacter (N3) and Supernitroplat (N4)) and three phosphate biofrtilizer...