Psychrotolerant; growth occurs at 02-26 ºC, optimal temperature is 20 ºC. Colonies
are punctiform at 48 h; at 7 days they are circular, gently undulate, granular, convex or
umbonate, glistening, opaque, butyrous, and pale yellow. Aerobic, c
an grow
anaerobically u
sing nitrate (with gas production). Grows in nutrient broth or PSS broth.
Range of pH: 5.5-9.0.
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Betaproteobacteria, Order Neisseriales, Family Chromobacteriaceae, Genus Aquaspirillum,
Aquaspirillum psychrophilum
(Terasaki 1973) Terasaki 1979.

Moved to genus Simplicispira as
Simplicispira psychrophila (Terasaki 1973) Grabovich et al. 2006.
Gram-negative, helical cells, 0.7-0.9 / 1.5-14.0 μm. Motile by flagella tufts at each pole.
Intracellular poly-beta-hydroxybutyrate is
not formed. Coccoid bodies are not formed.
Isolated from Antarctic mosses.
Undetermined.
  1. Tone Tonjum, 2005. Order IV. Neisseriales ord. nov. In: Bergey’s Manual of Systematic Bacteriology, Second edition, Vol two, part
    C The Alpha-, Beta-, Delta-, and Epsilonproteobacteria, George M. Garrity (Editor-in-Chief), pp 774-863.
  2. Euzeby (J.P.): List of Bacterial Names with Standing in Nomenclature: a folder available on the Internet. Int. J. Syst. Bacteriol.,
    1997, 47, 590-592. (List of Prokaryotic names with Standing in Nomenclature. http://www.bacterio.net).
Positive results for catalase, gelatin liquefaction (within 7 days), H2S production from
cysteine (weak, at 14 days), nitrate reduction & oxidase.

Negative results for casein hydrolysis, esculin hydrolysis, hippurate hyrolysis, indole product
ion, phosphatase, selenite reduction,
starch hydrolysis. Acid is not produced from sugars.
Cannot utilize citrate, succinate, fumarate, malate, pyruvate, lactate, malonate,
tartrate, acetate, propionate, butyrate, ethanol, n-propanol, n-butanol, glycerol, D-fructose, D-glucose, D-xylose & L-arabinose. No
turbidity occurs in media containing urea as sole nitrogen source.
Aquaspirillum psychrophilum
(c) Costin Stoica
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