| Pseudomonas extremaustralis |
Positive results for arginine dihydrolase, acid and alkaline phosphatase, catalase, nitrate reduction, oxidase and trypsin.
Can utilize as sole carbon source: alanine, D-fructose, meso-inositol, D-glucose, L-arabinose, D-mannitol, potassium gluconate,
glycerol, capric acid, adipic acid, malic acid, trisodium citrate, D-glucuronic acid and D-saccharic acid.
Negative results for casein hydrolysis esculin hydrolysis, beta-glucosidase, beta-galactosidase, gelatin hydrolysis, indole
production, lecithin hydrolysis, denitrification, starch hydrolysis, urease, acid production from glucose and sucrose.
No utilization of D-mannose, N-acetyl-glucosamine, L-phenylalanine and D-maltose.
No assimilation of (Biolog GEN III): sucrose, L-rhamnose, D-glucose-6-phosphate, L-pyroglutamic acid, p‐hydroxyphenylacetic acid,
trehalose, D-sorbitol, D-aspartic acid and Tween 40.
Can utilize as sole carbon source: alanine, D-fructose, meso-inositol, D-glucose, L-arabinose, D-mannitol, potassium gluconate,
glycerol, capric acid, adipic acid, malic acid, trisodium citrate, D-glucuronic acid and D-saccharic acid.
Negative results for casein hydrolysis esculin hydrolysis, beta-glucosidase, beta-galactosidase, gelatin hydrolysis, indole
production, lecithin hydrolysis, denitrification, starch hydrolysis, urease, acid production from glucose and sucrose.
No utilization of D-mannose, N-acetyl-glucosamine, L-phenylalanine and D-maltose.
No assimilation of (Biolog GEN III): sucrose, L-rhamnose, D-glucose-6-phosphate, L-pyroglutamic acid, p‐hydroxyphenylacetic acid,
trehalose, D-sorbitol, D-aspartic acid and Tween 40.
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Gammaproteobacteria, Order Pseudomonadales, Family Pseudomonadaceae,
Genus Pseudomonas, Pseudomonas extremaustralis Lopez et al. 2010.
Genus Pseudomonas, Pseudomonas extremaustralis Lopez et al. 2010.
Gram-negative rods. Motile. Non-spore-forming. PHB is accumulated using sodium
octanoate as carbon source.
octanoate as carbon source.
Colonies on nutrient agar plates are smooth, circular and non-pigmented. Growth
occurs at 4-37 ºC but not at 42 ºC. Produces fluorescent pigment on King B medium.
NaCl concentration range for growth (%, w/v): 0-6, pH range for growth: 6-8. Levan is
not produced from sucrose.
occurs at 4-37 ºC but not at 42 ºC. Produces fluorescent pigment on King B medium.
NaCl concentration range for growth (%, w/v): 0-6, pH range for growth: 6-8. Levan is
not produced from sucrose.
Isolated from a temporary water pond in Antarctica.
Undetermined. Not pathogenic to lettuce. Negative for potato soft rot.
- Lopez NI, Pettinari MJ, Stackebrandt E, Tribelli PM, Potter M, Steinbuchel A, Mendez BS. Pseudomonas extremaustralis sp. nov., a
Poly(3-hydroxybutyrate) producer isolated from an antarctic environment. Curr Microbiol 2009; 59:514-519. - Sawada H, Fujikawa T, Satou M. Pseudomonas aegrilactucae sp. nov. and Pseudomonas morbosilactucae sp. nov., pathogens
causing bacterial rot of lettuce in Japan. Int J Syst Evol Microbiol 2022; 72:5599. - Pavlov MS, Lira F, Martinez JL, Olivares-Pacheco J, Marshall SH. Pseudomonas fildesensis sp. nov., a psychrotolerant bacterium
isolated from Antarctic soil of King George Island, South Shetland Islands. Int J Syst Evol Microbiol 2020; 70:3255-3263.
(c) Costin Stoica
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