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Taxonomy
Morphology
Cultural characteristics
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Betaproteobacteria, Order Burkholderiales, Family Burkholderiaceae, Genus
Polynucleobacter, Polynucleobacter necessarius Heckmann and Schmidt 1987, type species of the genus.
Polynucleobacter, Polynucleobacter necessarius Heckmann and Schmidt 1987, type species of the genus.
Gram-negative short rods, 0.3 x 1.2-7.5 μm. Non-motile. Possess multiple nucleoid-
like structures .
like structures .
Non-cultivable. Obligately endosymbiotic organism.
Inhabits the cytoplasm of Euplotes aediculatus, and is essential for this cilliate. Most
probably descended from free-living strains of the genus Polynucleobacter.
probably descended from free-living strains of the genus Polynucleobacter.
Undetermined.
- Heckmann K. and Schmidt H.J.: Polynucleobacter necessarius gen. nov., sp. nov., an obligately endosymbiotic bacterium living in
the cytoplasm of Euplotes aediculatus. Int. J. Syst. Bacteriol., 1987, 37, 456-457. - 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.
(c) Costin Stoica
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