''Hyphomicrobium'' is a genus of
Gram-negative
Gram-negative bacteria are bacteria that do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation. They are characterized by their cell envelopes, which are composed of a thin peptidoglycan cell wall ...
, non-
spore
In biology, a spore is a unit of sexual or asexual reproduction that may be adapted for dispersal and for survival, often for extended periods of time, in unfavourable conditions. Spores form part of the life cycles of many plants, algae, f ...
-forming,
rod-shaped
A bacillus (), also called a bacilliform bacterium or often just a rod (when the context makes the sense clear), is a rod-shaped bacterium or archaeon. Bacilli are found in many different taxonomic groups of bacteria. However, the name ''Bacillu ...
bacteria
Bacteria (; singular: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among ...
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
Lis ...
.
[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 (; ) is a hairlike appendage that protrudes from certain plant and animal sperm cells, and from a wide range of microorganisms to provide motility. Many protists with flagella are termed as flagellates.
A microorganism may have f ...
) 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 Nomenclature ...
(LPSN).
References
Hyphomicrobiales
Bacteria genera
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