D-cellobiose, cellulose, dextran, dulcitol, fumaric acid, inulin, lactose, D-maltose, D-melibiose, melezitose, D-raffinose, L-rhamnose,
D-sorbose, sucrose, succinic acid, thioglycollate, D-xylose, L-aspartic acid, L-aspargine, L-cysteine, L-glycine, L-histidine, L-leucine,
L-isoleucine, L-methionine, L-proline, L-threonine & L-valine are not utilized.
Phylum Proteobacteria, Class Gammaproteobacteria, Order Pseudomonadales, Family Pseudomonadaceae, Genus Pseudomonas,
Pseudomonas meridiana Reddy et al. 2004 .
Gram-negative, motile with polar flagella, rods.
Colonies are circular, convex, smooth and translucent colonies with a diameter of 1–2
mm. Aerobic, psychrophilic - growth temperature 4-30 ºC (optimum 22 ºC), 48h.
Can tolerate 3 % NaCl (w/v). Optimum pH = 7.
Media: Trypticase Soy Agar ± 5% sheep blood, King’s B agar. Antarctic Bacterial
Medium (0.5% peptone, 0.2% yeast extract & 1.5% agar at pH 6.9).
Isolated from cyanobacterial mat samples (water) that were collected from Antarctica.
- Reddy GSN; Matsumoto GI; Schumann P; Stackebrandt E; Shivaji S.: Psychrophilic pseudomonads from Antarctica:
Pseudomonas antarctica sp. nov., Pseudomonas meridiana sp. nov. and Pseudomonas proteolytica sp. nov. Int J Syst Evol
Acid is produced from D-fructose, D-galactose, D-glucose, D-mannose and D-
mannitol, Acid is not produced from L-arabinose, lactose, L-rhamnose, sucrose & D-
xylose. Catalase, oxidase,lipase, urease (weak) & nitrates reduction are positive.
Phosphatase, beta-galactosidase, gelatinase, arginine dihydrolase, ornithine
decarboxylase, lysine decarboxylase, indole, methyl red, Voges–Proskauer test,
esculin hydrolysis, starch hydrolysis & cellulose are negative
Can utilize acetate, adonitol, citrate, meso-erythritol, D-fructose, D-galactose, D-
glucose, L-arabinose, glycerol, meso-inositol, lactic acid, D-mannose, D-mannitol,
pyruvate, D-ribose, sorbitol, trehalose, L-alanine, L-arginine, L-glutamic acid, L-
glutamine, L-lysine, L-serine, L-tyrosine & L-tryptophan.
(c) Costin Stoica