TABLE 2.
Characteristics of the alkane-degrading strains AK-01, Hxd3, and TD3 and other type species in various genera of the gram-negative sulfate-reducing bacteriaa
| Bacterial speciesb | Morphology | G+C content (mol%) | Desulfoviridind | Oxidatione | Electron donors for sulfate reductionf
|
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| H2 | For | A | P | FA | L | Fum | M | |||||
| Strain AK-01 | Short rod | 57 | − | C | +* | + | (+) | (+) | 4–16 | (+) | (+) | (+) |
| Strain Hxd3 | Rod | 63 | NR | C | − | − | − | − | 10–18 (4–8) | − | − | − |
| Strain TD3 | Curved rod | NRc | − | C | − | − | − | − | 4–18 | − | − | − |
| Desulfobacteriaceae | ||||||||||||
| Desulfosarcina variabilis | Oval, packages | 51 | − | C | +* | + | (+) | + | 4–14 | + | + | − |
| Desulfonema limicola | Multicellular filament | 35 | + | C | +* | + | (+) | + | 4–14 | + | + | − |
| Desulfococcus multivorans | Sphere | 57 | + | C | − | + | (+) | + | 4–16 | + | − | − |
| Desulfobacterium autotrophicum | Oval | 48 | − | C | +* | + | (+) | (+) | 4–16 | + | + | + |
| Desulfoarculus baarsii | Vibrio | 66 | − | C | − | + | (+) | (+) | 4–18 | − | − | − |
| Desulfobulbus propionicus | Oval | 60 | − | I | + | − | − | + | − | + | − | − |
| Desulfobacter postgatei | Oval | 46 | − | C | − | − | + | − | − | − | − | − |
| Desulfobotulus sapovorans | Vibrio | 53 | − | I | − | − | − | − | 4–16 | + | − | − |
| Desulfovibrionaceae | ||||||||||||
| Desulfovibrio desulfuricans | Vibrio | 59 | + | I | + | + | − | − | − | + | + | + |
| Desulfomicrobium baculatum | Rod | 57 | − | I | (+) | + | − | − | − | + | − | + |
Information for strain AK-01 is from this work. Information for strains Hxd3 and TD3 was adapted from references 1, 2, and 23. Information for all other species was adapted from references 29 and 31. See these references for details.
All except strains AK-01, Hxd3, and TD3 are type species of the respective genera (31).
NR, not reported.
+, present; −, absent.
Extent of organic substrate oxidation. C, complete; I, incomplete.
Abbreviations: For, formate; A, acetate, P, propionate; FA, fatty acids; numbers represent chain lengths (numbers in parentheses indicates poor utilization of those FA); L, lactate; Fum, fumarate; M, malate; *, autotrophic growth. For strain AK-01 only: +, >50% substrate utilized or sulfate reduced within 1 month; (+), >10% substrate utilized or sulfate reduced in 1 to 3 months; −, no substrate utilization or sulfate reduction in 3 months. For other bacteria: +, utilized; (+), poorly utilized; −, not utilized. Note: These data are a compilation and methods vary among studies. Comparison should be made with caution.