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Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Betaproteobacteria, Order Burkholderiales, Family Burkholderiaceae, Genus
Polynucleobacter, Polynucleobacter asymbioticus Hahn et al. 2016.
Basonym: Polynucleobacter necessarius Hahn et al. 2009. Four strains currently classified as Polynucleobacter necessarius subsp.
asymbioticus were reclassified as Polynucleobacter asymbioticus comb. nov., Polynucleobacter duraquae sp. nov.,
Polynucleobacter yangtzensis sp. nov. and Polynucleobacter sinensis sp. nov.
Polynucleobacter, Polynucleobacter asymbioticus Hahn et al. 2016.
Basonym: Polynucleobacter necessarius Hahn et al. 2009. Four strains currently classified as Polynucleobacter necessarius subsp.
asymbioticus were reclassified as Polynucleobacter asymbioticus comb. nov., Polynucleobacter duraquae sp. nov.,
Polynucleobacter yangtzensis sp. nov. and Polynucleobacter sinensis sp. nov.
Gram-negative short rods, 0.4–0.5 x 0.7–1.2 μm. Non-motile. Non-spore-forming.
Multiple nucleoid-like structures are usually absent, but elongated cells may possess
a few nucleoid-like structures.
Multiple nucleoid-like structures are usually absent, but elongated cells may possess
a few nucleoid-like structures.
Grows on NSY, R2A, Luria–Bertani and peptone media. Colonies on NSY agar are
non-pigmented, circular and convex with smooth surface. Growth occurs at 5-34 ºC
and in 0-0.4% (w/v) NaCl. Weak growth occurs in 0.5% (w/v) NaCl, and no growth in
0.6% (w/v) NaCl or higher concentrations. Facultatively anaerobic.
non-pigmented, circular and convex with smooth surface. Growth occurs at 5-34 ºC
and in 0-0.4% (w/v) NaCl. Weak growth occurs in 0.5% (w/v) NaCl, and no growth in
0.6% (w/v) NaCl or higher concentrations. Facultatively anaerobic.
Isolated from a small acidic freshwater pond located in the Austrian Alps at an altitude of 1300 m.
Undetermined.
- Hahn, M. W., Schmidt, J., Pitt, A., Taipale, S. J. and Lang, E. 2016. Reclassification of four Polynucleobacter necessarius strains as
representatives of Polynucleobacter asymbioticus comb. nov., Polynucleobacter duraquae sp. nov., Polynucleobacter
yangtzensis sp. nov. and Polynucleobacter sinensis sp. nov., and emended description of Polynucleobacter necessarius Int. J.
Syst. Evol. Microbiol., 66, 2883-2892. - Hahn M.W., Lang E., Brandt U., Wu Q.L. and Scheuerl T.: Emended description of the genus Polynucleobacter and the species
Polynucleobacter necessarius and proposal of two subspecies, P. necessarius subsp. necessarius subsp. nov. and P.
necessarius subsp. asymbioticus subsp. nov. Int. J. Syst. Evol. Microbiol., 2009, 59, 2002-2009. - Hahn M. W., Lang E., Tarao M. and Brandt U.: Polynucleobacter rarus sp. nov., a free-living planktonic bacterium isolated from an
acidic lake. Int. J. Syst. Evol. Microbiol., 2011, 61, 781-787.
(c) Costin Stoica
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| R E G N U M PROKARYOTAE |
Positive for catalase and oxidase.
Can assimilate acetate, propionate, pyruvate, malate, succinate, fumarate, D-galacturonic acid, L-cysteine, L-glutamate, L-aspartate,
urea, and thiosulfate. Weak reaction for formic acid, glyoxylic acid, malonic acid, levulinic acid, D-mannose, D-glucose, D-galactose,
D-lyxose, D-fructose, L-fucose, D-sorbitol, L-alanine, L-asparagine and betaine.
No assimilation of glycolate, oxalate, oxaloacetate, L-serine or citrate.
Can assimilate acetate, propionate, pyruvate, malate, succinate, fumarate, D-galacturonic acid, L-cysteine, L-glutamate, L-aspartate,
urea, and thiosulfate. Weak reaction for formic acid, glyoxylic acid, malonic acid, levulinic acid, D-mannose, D-glucose, D-galactose,
D-lyxose, D-fructose, L-fucose, D-sorbitol, L-alanine, L-asparagine and betaine.
No assimilation of glycolate, oxalate, oxaloacetate, L-serine or citrate.
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