Table 1.
Cultured strains of MTB and their magnetosome characteristics and production under different culture conditions. Numbers between brackets indicate the range of values for each parameter.
| Strain | Bacterial Morphology | Magnetosome | References | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Shape | Size (Length × Width) µm | Crystal Shape and Composition | Size (Length × Width) nm | Number/Cell | Size (Length × Width) nm | Number/Cell | Magneto-Some Production | ||
| Autotrophic | Heterotrophic | ||||||||
| Magnetospirillum magneticum AMB-1 | Spirillum | 3 × 0.4–0.6 | Cuboctahedral magnetite | No growth | No growth | 41 ± 15 | 12 ± 5 (anaerobic) | 1.4 × 109 cells mL−1; 2.6 mg L−1 magnetite (=2.8% cell weight) | [12,29] |
| SF = 0.78 | |||||||||
| (anaerobic) | |||||||||
| 33 ± 8.5 | |||||||||
| SF = 0.89 | 7 ± 4 (aerobic) | ||||||||
| (aerobic) | |||||||||
| Magnetospirillum magnetotacticum MS-1 | Spirillum | 4–6 × 0.25 | Cuboctahedral magnetite | No growth | No growth | 42 (25–55) | 17.6 (5–41) | 0.2–0.6 g cell L−1 (wet weight) | [13,65] |
| SF = 0.9 | |||||||||
| Magnetospirillum Gryphiswaldense MSR-1 | Spirillum | 1–20 × 0.7 | Cuboctahedral magnetite | NI | NI | Ø 46 ± 6.8 (14–67) | 23.4 ± 0.9 | 41.7 mg L−1 (16.7 mg L−1 day−1) | [66,67] |
| SF = 0.91 | |||||||||
| Magnetovibrio blakemorei MV-1 | Vibrio | 1–3 × 0.2–0.4 | Elongated prismatic magnetite | 48 ± 5 (30–59) × 26 ± 7 (28–40) | 17 ± 4 (7–23) | 60 × 40 | 15.34 ± 4 | 15.14 mg L−1; (4.98 mg L−1 day−1) | [39,68,69] |
| AR = 1.8 ± 0.3 | SF = 0.65 | ||||||||
| Magnetospira thiophila MMS-1 | Spirillum | 1–3 × 0.2–0.5 | Elongated octahedral magnetite | NI | NI | 61 ± 12 (22–85) × 52 ± 11 (18–80) | 17 ± 5 (8–31) | NI | [18,69] |
| AR = 1.2 ± 0.1 | |||||||||
| SF = 0.85 | |||||||||
| Magnetospira thiophila QH-2 | Spirillum | 2.0 ± 0.4 (1–3) × 0.8 ± 0.2 | Elongated octahedral magnetite | NI | NI | 81 ± 23 × 58 ± 20 SF = 0.71 ± 0.11 | 16 ± 5 (7–28) | NI | [19] |
| Magnetofaba australis IT-1 | Faba-bean | 1.4 ± 0.3 × 1.1 ± 0.3 (n = 130) | Elongated octahedral magnetite | NI | 6 ± 4 (n = 100) | 83 ± 26 × 74 ± 23 | 10 ± 3 (n = 100) | NI | [16] |
| SF = 0.89 ± 0.05 | |||||||||
| Magnetococcus marinus MC-1 | Cocci | Ø = 1–2 µm | Elongated pseudo-hexagonal prismatic magnetite | 72 ± 11 (33–95) × 70 ± 13 (29–87) | 10 ± 2 (6–15) | 83 ± 14 (30–110) × 78 ± 11 (15–107) | 14 ± 3 (8–19) | NI | [15,69] |
| AR=1.2 ± 0.2 | AR = 1.2 ± 0.1 | ||||||||
| SF = 0.93 | |||||||||
| Magnetococcus MO-1 | Ovoid | 1.33 ± 0.19 × 1.85 ± 0.40 | Elongated cuboctahedral magnetite | No growth | No growth | 64 ± 20 × 57 ± 17 | 17 ± 5 | NI | [14] |
| SF = 0.89 | |||||||||
| Strain BW-2 | Rod | 4.4 ± 0.6 × 2.2 ± 0.2 (n = 62) | Cuboctahedral magnetite | 67 ± 16 × 63 ± 15 | 30 ± 9 (n = 46) | No growth | No growth | NI | [25] |
| SF= 0.94 ± 0.04 (n = 189) | |||||||||
| Strain SS-5 | Rod | 2.5 ± 0.5 × 1.2 ± 0.1 (n = 64) | Elongated prismatic magnetite | 86 ± 27 × 63 ± 19 | 20 ± 7 (n = 45) | NI | NI | NI | [25] |
| SF = 0.74 ± 0.07 (n = 171) | |||||||||
| Desulfovibrio magneticus RS-1 | Vibrio | 3–5 × 1 | Bullet-shaped magnetite | No growth | No growth | Mean length = 60 nm (32–85 nm) | 12–15 | NI | [23,70] |
| SF = 0.5 | |||||||||
| Candidatus Desulfamplus magnetomortis BW-1 | Rod | ≈ 4 × ≈1 | Bullet-shaped magnetite and/or pleomorphic greigite | No growth | No growth | Mean length = 55 nm | NI | NI | [24,71] |
| SF = 0.6 | |||||||||
AR = aspect ratio; NI = Not indicated (values are not present in the literature); SF = Shape factor.