Cross Index Gram negative Curved Motile Aerobes
SuperSet Prokaryote, Eubacteria
Compare  
Contrast Archaea,
Subset Alteromonas, Aquaspirillum, Azospirillum , Bdellovibrio, Campylobacter, Cellvibrio mixtus , Halovibrio variabilis , Helicobacter, Herbaspirillum seropedicae, Marinomonas, Micavibrio admirandus
Oceanospirillum, Spirillum, "Sporospirillum", Vampirovibrio chlorellavorus ,Wolinella

 

Morphology Gram negative Curved Motile Aerobes
CELLULAR  
Staining Gram-negative; Azospirillum may be Gram-variable.
Morphology Helical or vibrioid cells, having from less than one complete helical turn to many turns
Motility Motile in broth cultures by polar flagella. Swim in straight lines with a characteristic corkscrew-like motion.
Specialized structures Many species form intracellular poly-B-hydroxybutyrate. Many possess a "polar membrane" attached to the inside of the cytoplasmic membrane by barlike links; this generally occurs underlying the region of flagellar insertion. Many of the organisms become converted into thin-walled "coccoid bodies" in old cultures. Azospirillum produces enlarged, encapsulated forms that may superficially resemble cysts.
Division  
COLONIAL  
Solid surface  
Liquid  

 

Growth Parameters Gram negative Curved Motile Aerobes
PHYSIOLOGICAL  
Tropism  
Oxygen Aerobic or microaerophilic, having a respiratory type of metabolism with oxygen as the normal electron acceptor. Growth under anaerobic conditions is absent or very poor, or may occur only with special electron acceptors such as nitrate or fumarate. A few species can acidify certain sugar media under anaerobic conditions, but they grow very poorly and much prefer aerobic conditions.
pH  
Temperature  
Requires Chemoorganotrophic; however, some species may grow autotrophically in a mixture of H2 + CO2 + O2.
Produces Most members of the group are incapable of catabolizingcarbohydrates, but some can oxidize a limited variety. Some can fix N2 under microaerobic conditions.Typically oxidase-positive. Indole is not produced.
Enzymes  
Unique features  
ENVIRONMENTAL  
Habitat Occur in soil, fresh water or marine environments, within plant roots, or in the reproductive

Organs, intestinal tract and oral cavity of man and animals.

Lifestyle Some are predatory on other microorganisms
Pathogenicity  
Distribution  
Genome Gram negative Curved Motile Aerobes
G+C Mol % 30 - 70
   

 

Reference Gram negative Curved Motile Aerobes
The Prokaryotes p
Bergey's Systematatic p 71- 124
Bergey's Determinative p 39-64
References