The Prokaryotes pp 3241-3246 | Cite as

The Genus Psychrobacter

  • Elliot Juni


In early studies, all saprophytic, nonpigmented Gram-negative rods were classified together in the genus Achromobacter (Bergey et al., 1923; Ingram and Shewan, 1960). Although the original Achromobacter liquefaciens type strain (no longer available) was motile, the genus was said to include both motile and nonmotile organisms. Brisou and Prévot (1954) suggested that the nonmotile achromobacters be separated from the motile species and grouped in the genus Acinetobacter. When the oxidase test, an assay for the presence of cytochrome c (Baumann et al., 1968a), first became widely used (Buttiaux and Gagnon, 1959), it was recognized that the genus Acinetobacter included both oxidase-positive and oxidase-negative members. Further studies resulted in classification of only the oxidase-negative organisms as strains of Acinetobacter (Lessel, 1971) because of similarities in their phenotypic properties (Baumann et al., 1968b), genetic interaction of all strains with a competent strain (Juni, 1972), and also from the results of DNA-DNA homology studies (Johnson et al., 1970).


Sodium Lactate Monosodium Glutamate Ferric Ammonium Citrate Transformation Assay Psychrotrophic Bacterium 
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© Springer Science+Business Media New York 1992

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  • Elliot Juni

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