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, can grow
anaerobically using nitrate (with gas production). Grows in nutrient broth or PSS broth.
Range of pH: 5.5-9.0.
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.
- 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.
- 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 production, 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.
(c) Costin Stoica