Encyclopedia > Arthrobacter

  Article Content

Arthrobacter

Arthrobacter
Scientific classification
Domain:Bacteria
Phylum:Actinobacteria
Order:Actinomycetales[?]
Family:Micrococcaceae[?]
Genus:Arthrobacter
Arthrobacter is a genus of bacteria that is commonly found in soil. All species in this genus are Gram-positive obligate aerobes that are rods[?] during exponential growth and cocci[?] in their stationary phase[?].

Colonies of Arthrobacter have a greenish metallic center on mineral salts pyridone broth incubated at 20°ree; C. This genus is distinctive because of its unusual habit of "snapping division" in which the outer cell wall[?] ruptures at a joint (hence its name). Microbiologists refer to the type of cell division in which rods break into cocci as reversion. Under the microscope, these dividing cells appear as chevrons ("V" shapes). Other notable characteristics are that it can use pyridone[?] as its sole carbon source, and that its cocci are resistant to desiccation[?] & starvation.

Life cycle Induction phase (rods and cocci are mixed), Bacillary phase (motile rods predominate during exponential growth), Reversion phase (rods break into cocci) -> Induction...



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Danube Delta

...   Contents Danube Delta The Danube Delta (3446 sq km), located in Dobrogea, Romania is the largest and best preserved of European deltas. It hosts over 300 ...