Cross Index Azotobacter
SuperSet Prokaryote, Eubacteria, Gram-Negative Aerobic/ Microaerophilic Rods and Cocci
Compare Acetobacter, Acidiphilium, Acidomonas methanolica, Acidothermus cellulolyticus, Acidovorax, Acinetobacter, Afipia, Agrobacterium, Agromonas oligotrophica, Alcaligenes, Alteromonas, Aminobacter, Aquaspirillum, Azomonas, Azorhizobium caulinodans, Azotobacter, Bacteroides, Beijerinckia, Bordetella, Bradyrhizobium japonicum, Brucella, Chromohalobacter marismortui, Chryseomonas luteola, Comamonas, Cupriavidus necator, Deleya, Derxia gummosa, Ensifer adherans, Erythrobacter longus, Flavobacterium, Flavomonas oryzihabitans, Francisella, Frateuria aurantica, Gluconobacter, Halomonas, Hydrogenophaga, Janthinobacterium lividum, Kingella, Lampropedia hyalina, Legionella, Marinobacter hydrocarbonoclasticus, Marinomonas, Mesophilobacter marinus, Methylobacillus glycogenes, Methylobacterium, Methylococcus, Methylomonas, Methylophaga, Methylophilus, Methylovorus glucosotrophus, Moraxella, Morococcus cerebrosus, Neisseriaceae, Neisseria, Oceanospirillum, Ochrobactrum anthropi, Oligella, Paracoccus, Phenylobacterium immobile, Phyllobacterium, Pseudomonas, Psychrobacter immobilis, Rhizobacter daucus, Rhizobium, Rhizomonas suberifaciens, Rochalimaea, Roseobacter, Rugomonas rubra, Serpens, Sinorhizobium, Sphingobacterium, Taylorella equigenitalis, Thermoleophilum, Thermomicrobium, Thermus, Variovorax paradoxus, Volcaniella eurhalina, Weeksella, Wolinella, Xanthobacter, Xanthomonas, Xyella fastidiosa, Xylophilus ampelinus, Zoogloea ramigera
Contrast Archaea
Subset  

 

Morphology Azotobacter
CELLULAR  
Staining Gram negative
Morphology large ovoid cells 1.5-2.0 um in diameter. Pleomorphic ranging from rods to coccoid cells. Occur singly, in pairs or irregular cllumps and sometimes in chains of varying length
Motility some strains are nonmotile, otherwise motility occurs by peritrichous flagella
Specialized structures do not form endospores but form cysts
Division  
COLONIAL  
Solid surface  
Liquid waer soluble and water insoluble pigments may be produced

 

Growth Parameters Azotobacter
PHYSIOLOGICAL  
Tropism chemoorganotroph
Oxygen aerobe but can grow is a microaerophile
pH range 4.8-8.5 Optimum 7.0-7.5
Temperature  
Requirements Molybdenum is required for nitrogen fixation (may be replaced by vanadium)
Products . Can use nitrate and ammonium salts ( all but one species) and certain amino acids as sources of nitrogen
Enzymes catalase positive
Unique features Nitrogen fixers; generally fix nonsymbiotically at least 10 mg of N2 per g of carbohydrate consumed
ENVIRONMENTAL  
Habitat soil and water . One species occurs in association with plant roots
Lifestyle  
Pathogenicity  
Distribution  

 

Genome Azotobacter
G+C Mol %  
   

 

Reference Azotobacter
First Citation Beijerinck, M. W. 1901 Ueber oligonitrophile Mikroben. Zentralbl.Bakteriol. Parasitenkd. Infektionskr. Hyg. Abt II 7: 561-582
The Prokaryotes p
Bergey's Systematic p 220 Y-T. Tchan and P. B. New
Bergey's Determinative p 77
References