Pseudomonas congelans
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Pseudomonadales, Family Pseudomonadaceae, Genus Pseudomonas,  
Pseudomonas congelans
 Behrendt et al. 2003.
Gram-negative, non-sporeforming rods, motile by one polar flagellum, 2.5-2.9 µm
wide and about 0.8 µm long.
Aerobic, optimal growth temperature 21 ºC. Media: Trypticase Soy Agar, Nutrient agar,
King’s agar A & B. Colonies on King A and B media are white-yellowish, smooth with
regular margins and produce a pigment with light yellow-green fluorescence on UV
light. Nonhemolytic on sheep blood agar.
First isolated from the phyllosphere of grasses in Germany. Presents ice nucleation activity.
Possible plant pathogen.
  1. Behrendt U., Ulrich A. & Schumann P.: Fluorescent pseudomonads associated with the phyllosphere of grasses; Pseudomonas
    trivialis sp. nov., Pseudomonas poae sp. nov. and Pseudomonas congelans sp. nov. Int. J. Syst. Evol. Microbiol., 2003, 53, 1461-
    1469.
  2. Sarah E. Burr, Stefanie Gobeli, Peter Kuhnert, Elinor Goldschmidt-Clermont, and Joachim Frey: Pseudomonas chlororaphis
    subsp. piscium subsp. nov., isolated from freshwater fish. Int J Syst Evol Microbiol December 2010 60:2753-2757.
Positive results for gelatinase, casein hydrolysis, catalase, aesculin hydrolysis & aerobic acid formation from glucose.
Can utilize: acetate, citrate, gluconate, caprate, DL-lactate,
malonate, L-alanine, L-arabinose, D-arabitol, m-inositol, D-mannitol,
sucrose, D-galacturonic acid, D-glucosaminic acid, D-glucuronic acid, L-asparagine, L-pyroglutamic acid, L-threonine, D-trehalose,
glycerol, DL-lactic acid, 2-aminoethanol, i-erythritol, alpha-D-glucose, glycyl, L-glutamic acid, DL-alpha-glycerol phosphate, alpha-
hydroxybutyric acid, beta-hydroxybutyric acid, formic acid, L-histidine, monomethyl succinate, L-proline, D-psicose, quinic acid, D-
sorbitol, L- and D-serine, succinamic acid, & Tween 40.

Negative for arginine dihydrolase, DNase, beta-galactosidase, indole production, formation of H
2S from sodium thiosulphate,
reduction of nitrate to nitrite, denitrification, oxidase, hydrolysis of starch, formation of levan from sucrose & urease.
No utilization of:
propionate, 2- and 5-ketogluconate, maltose, adipate, itaconate, D-tartrate, N-acetyl-D-glucosamine, DL-carnitine, D-
cellobiose, glucose 6-phosphate, glycyl L-aspartic acid, gamma-hydroxybutyric acid, hydroxy-L-proline, glycogen, p-
hydroxyphenylacetic acid, alpha-ketovaleric acid, L-ornithine, putrescine & L-rhamnose.
(c) Costin Stoica
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