| Streptoverticillium |
| Morphology | Streptoverticillium |
| CELLULAR |
| Staining | Gram-positive |
| Morphology | Substrate mycelium, 0.8-1.2 um in diameter, branching. The aerial mycelium consists of long, straight filaments bearing at more or less regular intervals branches (3-6) arranged in whorls (verticils). The appearance at about 100 x magnification is of "barbed wire". Each branch of the verticil produces at its apex an umbel that consists of two to many chains of spherical to ellipsoidal spores. Spore chains may be straight or flexuous or terminate in hooks. Spiral spore chains have not been observed. Reproduction occurs either from fragments of substrate and/or aerial mycelium or from germination of spores. Spores are smooth surfaced to slightly rough. Neither spiny nor hairy spores have been observed. On primary isolation colonies are small and discrete, developing a weft of aerial mycelium that typically appears cottony. |
| Motility | |
| Specialized structures |
| Division |
| COLONIAL |
| Solid surface | Most species produce soluble pigments and coloured substrate and aerial mycelium |
| Liquid |
| Growth Parameters | Streptoverticillium |
| PHYSIOLOGICAL |
| Tropism | Chemoorganotrophic |
| Oxygen | Aerobic, substrate growth may develop under reduced oxygen tensions or increased carbon dioxide concentrations. |
| pH | pH 6.5-8.0 |
| Temperature | Mesophilic Optimum growth between 26` and 32`C |
| Requirements | Media low in available carbohydrates are particularly suitable for spore production |
| Products | |
| Enzymes | |
| Unique features | ...
They are resistant to lysozyme and to neomycin; they
produce compounds that exhibit antifungal, antibacterial,
antiprotozoal, and antitumour activity and are sensitive
to antibacterial agents and actinophages. Cell walls contain L-diaminopimelic acid (L- DAP). Cells contain major amounts of saturated, iso- and anteiso-fatty acids, MK-9(H6) and MK-9(H8) menaquinones, and the phospholipids (diphosphatidylglycerol, phosphatidy- lethanolamine, phosphatidylinositol, and phosphatidy- linositol mannosides). |
| ENVIRONMENTAL |
| Habitat | Mostly saprophytes in soil. |
| Lifestyle | |
| Pathogenicity |
| Distribution |
| Genome | Streptoverticillium |
| G+C Mol % | 69-73(Tm) |
| Reference | Streptoverticillium |
| First citation | Baldacci,E. 1958. Development in the classification of actinomycetes. G. Microbiol 6: 10-27 |
| Emended | Baldacci, E.., G. Farina and R. Locci 1966. Emendation of the genus Streptoverticillium Baldacci 1958 and revision of some species. G. Microbiol 14: 153-171 |
| The Prokaryotes | |
| Bergey's Systematatic | p 2492 R. Locci and G. M. Schofield |
| Bergey's Determinative | p 668 |
| References |