| Cross Index | Hyphomicrobium |
| SuperSet | Prokaryote, Eubacteria Budding and/or Appendaged Bacteria |
| Compare | Prosthecate Bacteria: Ancalomicrobium adetum Asticcacaulis Caulobacter Dichotomicrobium thermohalophilum,
Filomicrobium fusiforme,
Hirschia baltica,
Hyphomicrobium
Hyphomonas, Labrys monachus , Pedomicrobium, Prosthecobacter fusiformis,
Prosthecomicrobium,
Stella, Verrucomicrobium spinosum Non Prosthecate Bacteria Angulomicrobium tetraedrale Blastobacter Ensifer adherans,Gallionella ferrunginea Gemmiger formicilis, Nevskia ramosa, Seliberia stellata Planctomycetales Planctomyces, Gemmata obscuriglobus , Isosphaera pallida, Pirelulla |
| Contrast | Archaea |
| Subset |
| Morphology | Hyphomicrobium |
| CELLULAR |
| Staining | Gram-negative and non-acid-fastCells stain with carbol fuchsin but stain only feebly with aqueous aniline dyes |
| Morphology | Cells 0.3-1.2 x 1-3 um; rod-shaped with pointed ends, or oval, egg- or bean-shaped; produce monopolar or bipolar filamentous outgrowths (hyphae or prosthecae) of varying length and 0.2-0.3 um in diameter |
| Motility | motile Motility is lost soon after swarmer cell liberation and/or attachment. Older cultures nearly lack motile swarmer cells |
| Specialized structures | ,The hyphae are not septate, but hyphal cytoplasmic membranes show conspicuous constrictions. Hyphae may be truly branched; secondary branches are rare.. Do not form spores. Multiplication: daughter cell formation by a budding process at one hyphal tip at a time (mature buds become motile as swarmers, break off, and may attach themselves to surfaces or other cells to form clumps or rosettes.. Poly-B- hydroxybutyrate is stored by most cells, usually at a distinct cell pole. |
| Division |
| COLONIAL |
| Solid surface | Colonies on solid media are small, even after prolonged incubation; they are brownish in transmitted light and bright beige or colourless in reflected light. Colony surface is shiny or granular, folded or smooth. Older colonies often display concentric rings and change colour to darker brown or bright yellow-orange |
| Liquid |
| Growth Parameters | Hyphomicrobium |
| PHYSIOLOGICAL |
| Tropism | Chemoorganotrophic |
| Oxygen | aerobic |
| pH | Optimum pH: above 7.0, except for one species with a lower optimum |
| Temperature | Mesophilic |
| Requirements | Carbon dioxide is required for growth Oligocarbophilic, i.e. growth can occur on mineral salts media without added carbon sources. Growth may be stimulated by soil extract if the pH remains near neutral. Good growth with 0.1-0.2% (w/v) of one-carbon compounds such as methanol or methylamine. NH4+ is a good nitrogen source, but organic nitrogen compounds (amino acids) may also be utilized. |
| Products | Do not nitrify |
| Enzymes | |
| Unique features |
| ENVIRONMENTAL |
| Habitat | Widely distributed in soils and aquatic habitats |
| Lifestyle | |
| Pathogenicity |
| Distribution |
| Genome | Hyphomicrobium |
| G+C Mol % | 59 to 65 (Tm) |
| Reference | Hyphomicrobium |
| First citation | Stutzer,A. and R. Hartleb. 1898. Untersuchungen uber die bei der Bildung von Salpeter beobachteten Mikroorganismen. I. Mitt. Landw. Inst. Konigl. Univ. Breslau 1:75-100 |
| The Prokaryotes | |
| Bergey's Systematatic | p 1895 P. Hirsch |
| Bergey's Determinative | p 461 |
| References |