Polynucleobacter difficilis

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Polynucleobacter difficilis
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P. difficilis
Binomial name
Polynucleobacter difficilis
Hahn et al. 2012 [1]

Polynucleobacter difficilis is an aerobic, catalase- and oxidase-positive, chemo-organotrophic, nonmotile, freshwater bacterium of the genus Polynucleobacter , isolated from the Lake Sevan from a depth of 60 m in Armenia. [2] [3] [4]

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Polynucleobacter cosmopolitanus is an aerobic, catalase- and oxidase-positive, chemo-organotrophic, nonmotile bacterium of the genus Polynucleobacter, isolated from freshwater habitats in Eurasia, South America, North America, Africa, Oceania, the Hawaiian Archipelago, in lakes located in Japan, and a river estuary of northern Taiwan. The type strain of the species was isolated from Lake Mondsee in Austria.

Polynucleobacter rarus is an aerobic, chemo-organotrophic, catalase- and oxidase-positive, nonmotile bacterium of the genus Polynucleobacter, isolated from an acidic lake in Wisconsin.

Polynucleobacter asymbioticus is an aerobic, catalase- and oxidase-positive, chemo-organotrophic, nonmotile, free-living bacterium of the genus Polynucleobacter. The type strain was isolated from a small pond located in the Austrian Alps in the area of Salzburg and described as a new subspecies of Polynucleobacter necessarius in 2009. The classification of the type strain was hampered by the fact that its closest described relative represented obligate endosymbionts, i.e. P. necessarius, not available as a pure culture suitable for standard tests for delineation of prokaryotic species. Therefore, the strain was preliminarily placed in the subspecies P. necessarius subsp. asymbioticus. Later sequencing of the genome of the type strain revealed that the strain represented a novel species within the genus Polynucleobacter. Therefore, its taxonomic rank was lifted from the subspecies to the species level. Strains of P. asymbioticus dwell as planktonic organisms in acidic, humic-rich freshwater systems. Comparative genome analyses revealed that P. asymbioticus represents an atypical member of the family Burkholderiaceae regarding its small genome size and its passive lifestyle. A recent study used a collection of 37 P. asymbioticus strains isolated from various ponds located in a larger region of the Austrian Alps to gain insights in the evolution of Polynucleobacter bacteria.

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Polynucleobacter campilacus is an aerobic, catalase- and oxidase-positive, chemo-organotrophic, nonmotile, free-living bacterium of the genus Polynucleobacter., The type strain was isolated from Lake Feldsee located in the Southern Black Forest in Germany. The species epithet "campilacus" refers to the origin of the type strain from this lake. The complete genome sequence of the strain was determined. Among the described Polynucleobacter species, P. campilacus is closest related to P. hirudinilacicola.

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Polynucleobacter aenigmaticus is an aerobic, facultatively anaerobic, chemo-organotrophic, non-motile, free-living bacterium of the genus Polynucleobacter.

Polynucleobacter sphagniphilus is an aerobic, chemo-organotrophic, non-motile, free-living bacterium of the genus Polynucleobacter.

Polynucleobacter hirudinilacicola is an aerobic, chemo-organotrophic, non-motile, free-living bacterium of the genus Polynucleobacter.

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References

  1. bacterio.net Archived 2013-09-21 at the Wayback Machine
  2. Hahn, MW; Minasyan, A; Lang, E; Koll, U; Spröer, C (2012). "Polynucleobacter difficilis sp. nov., a planktonic freshwater bacterium affiliated with subcluster B1 of the genus Polynucleobacter". Int J Syst Evol Microbiol. 62 (Pt 2): 376–83. doi:10.1099/ijs.0.031393-0. PMC   4266013 . PMID   21441373.
  3. Leibniz-Institut dsmz-deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH
  4. UniProt