| Pseudomonas helvetica |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Gammaproteobacteria, Order Pseudomonadales, Family Pseudomonadaceae,
Genus Pseudomonas, Pseudomonas helvetica Poli et al. 2024.
Species description is based on a single isolate.
Genus Pseudomonas, Pseudomonas helvetica Poli et al. 2024.
Species description is based on a single isolate.
Gram-negative rods, 1.6 x 3.1 µm. Motile by two polar flagella. Non-spore-forming.
Colonies are small, compact, and pale-yellow. Old colonies show a green pigment in
the center of the colony. In R2A medium, cells can grow between 20 and 35 ºC
(optimum 28 ºC). Strong growth at pH 6 but very weak growth at pH 5. Aerobic.
the center of the colony. In R2A medium, cells can grow between 20 and 35 ºC
(optimum 28 ºC). Strong growth at pH 6 but very weak growth at pH 5. Aerobic.
Isolated from the rhizosphere of wheat in Switzerland .
Undetermined.
- Poli N, Keel CJ, Garrido-Sanz D. Expanding the Pseudomonas diversity of the wheat rhizosphere: four novel species antagonizing
fungal phytopathogens and with plant-beneficial properties. Front Microbiol 2024; 15:1440341.
Positive results for reduction of nitrates to nitrites, fermentation of glucose, beta-galactosidase, beta-glucosidase and protease.
Can utilize (API 20 NE): N-acetyl-glucosamine, maltose (weak), mannose, mannitol, potassium gluconate, capric acid, malate and
trisodium citrate.
Can oxidize (API 50 CH): glycerol, L-arabinose, D-ribose, D-xylose, D-galactose, D-glucose, D-fructose, D-mannose, inositol,
D-mannitol, D-sorbitol, arbutin, esculin ferric citrate, salicin, D-cellobiose, D-maltose, D-melibiose, D-saccharose, D-trehalose,
D-melezitose, D-raffinose, D-turanose, 5-ketogluconate, 2-ketogluconate (weak) and D-lactose (weak), .
Can utilize as sole carbon source (Biolog GEN III): alpha-keto-butyric acid (weak), acetoacetic acid (weak), D-trehalose, sucrose,
N-acetyl-D-glucosamine, alpha-D-glucose, D-mannose, D-fructose, inosine, D-mannitol, D-arabitol, glycerol, D-aspartic acid,
D-serine, glycyl-L-proline, L-alanine, L-arginine, L-aspartic acid, L-glutamic acid, L-histidine, L-pyroglutamic acid, L-serine, pectin,
D-gluconic acid, mucic acid, quinic acid, D-saccharic acid, methyl pyruvate, L-lactic acid, citric acid, alpha-keto-glutaric acid, L-malic
acid, bromo-succinic acid, Tween 40, gamma-amino-butyric acid, alpha-hydroxy-butyric acid, beta-hydroxy-D,L-butyric acid, acetic
acid, and formic acid.
Negative results for arginine dihydrolase, indole production and urease.
No assimilation of: adipic acid, L-arabinose and phenylacetic acid.
No utilization of: erythritol, D-arabinose, D-maltose, D-raffinose, apha-D-lactose, D-melibiose, beta-methyl-D-glucoside, D-salicin,
N-acetyl-D-galactosamine, N-acetyl neuraminic acid, D-galactose, 3-methyl glucose, L-fucose, L-rhamnose, D-sorbitol, myo-inositol,
D-fructose-6-phosphate, gelatin, D-galacturonic acid, D-glucuronic acid, glucuronamide, p-hydroxy-phenylacetic acid, D-malic acid
and propionic acid.
Can utilize (API 20 NE): N-acetyl-glucosamine, maltose (weak), mannose, mannitol, potassium gluconate, capric acid, malate and
trisodium citrate.
Can oxidize (API 50 CH): glycerol, L-arabinose, D-ribose, D-xylose, D-galactose, D-glucose, D-fructose, D-mannose, inositol,
D-mannitol, D-sorbitol, arbutin, esculin ferric citrate, salicin, D-cellobiose, D-maltose, D-melibiose, D-saccharose, D-trehalose,
D-melezitose, D-raffinose, D-turanose, 5-ketogluconate, 2-ketogluconate (weak) and D-lactose (weak), .
Can utilize as sole carbon source (Biolog GEN III): alpha-keto-butyric acid (weak), acetoacetic acid (weak), D-trehalose, sucrose,
N-acetyl-D-glucosamine, alpha-D-glucose, D-mannose, D-fructose, inosine, D-mannitol, D-arabitol, glycerol, D-aspartic acid,
D-serine, glycyl-L-proline, L-alanine, L-arginine, L-aspartic acid, L-glutamic acid, L-histidine, L-pyroglutamic acid, L-serine, pectin,
D-gluconic acid, mucic acid, quinic acid, D-saccharic acid, methyl pyruvate, L-lactic acid, citric acid, alpha-keto-glutaric acid, L-malic
acid, bromo-succinic acid, Tween 40, gamma-amino-butyric acid, alpha-hydroxy-butyric acid, beta-hydroxy-D,L-butyric acid, acetic
acid, and formic acid.
Negative results for arginine dihydrolase, indole production and urease.
No assimilation of: adipic acid, L-arabinose and phenylacetic acid.
No utilization of: erythritol, D-arabinose, D-maltose, D-raffinose, apha-D-lactose, D-melibiose, beta-methyl-D-glucoside, D-salicin,
N-acetyl-D-galactosamine, N-acetyl neuraminic acid, D-galactose, 3-methyl glucose, L-fucose, L-rhamnose, D-sorbitol, myo-inositol,
D-fructose-6-phosphate, gelatin, D-galacturonic acid, D-glucuronic acid, glucuronamide, p-hydroxy-phenylacetic acid, D-malic acid
and propionic acid.
(c) Costin Stoica
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