''Hyphomicrobium'' is a genus of

Gram-negative Gram-negative bacteria are bacteria that, unlike gram-positive bacteria, do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation. Their defining characteristic is that their cell envelope consists ...

, non-

spore In biology, a spore is a unit of sexual reproduction, sexual (in fungi) or asexual reproduction that may be adapted for biological dispersal, dispersal and for survival, often for extended periods of time, in unfavourable conditions. Spores fo ...

-forming,

rod-shaped Bacterial cellular morphologies are the shapes that are characteristic of various types of bacteria and often key to their identification. Their direct examination under a light microscope enables the classification of these bacteria (and archae ...

bacteria Bacteria (; : bacterium) are ubiquitous, mostly free-living organisms often consisting of one Cell (biology), biological cell. They constitute a large domain (biology), domain of Prokaryote, prokaryotic microorganisms. Typically a few micr ...

from the family of

Hyphomicrobiaceae The Hyphomicrobiaceae are a family of bacteria. Among others, they include '' Rhodomicrobium'', a genus of purple bacteria. Phylogeny The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature Li ...

.Characterization and Description of ''Hyphomicrobium denitrificans'' sp. nov.
/ref> It has a large polar or sub-polar filiform prostheca very similar to that of ''Caulobacter''. In addition to having a nutritional function, the prostheca also plays a role in the initiation of DNA replication. Reproduction in ''Hyphomicrobium'' begins when its hyphal filament (prostheca) grows from one end of the cell (this happens when the cell no longer has a

flagellum A flagellum (; : flagella) (Latin for 'whip' or 'scourge') is a hair-like appendage that protrudes from certain plant and animal sperm cells, from fungal spores ( zoospores), and from a wide range of microorganisms to provide motility. Many pr ...

) and the bud grows from the tip of the prostheca that eventually differentiates into a new swarmer cell.

Phylogeny

The currently accepted taxonomy is based on the

List of Prokaryotic names with Standing in Nomenclature List of Prokaryotic names with Standing in Nomenclature (LPSN) is an online database that maintains information on the naming and taxonomy of prokaryotes, following the taxonomy requirements and rulings of the International Code of Nomenclatu ...

(LPSN). The phylogeny is based on whole-genome analysis.

References

Hyphomicrobiales Bacteria genera {{Hyphomicrobiales-stub