Table 2.

Determinative characteristics of aerobic anoxygenic phototrophic genera

CharacteristicSandaracinobacterErythromonasErythromicrobiumRoseococcusPorphyrobacterAcidiphiliumErythrobacterRoseobacter
EnvironmentFreshwaterFreshwaterFreshwaterFreshwaterFreshwaterFreshwaterMarineMarine
Cell shape and size (μm)Thin, long rods (0.3–0.5 by 1.5–2.5)Ovoid (0.8–1.0 by 1.3–2.6)Rods, branched (0.7–1.0 by 1.6–2.5)Coccoid (0.9–1.3 by 1.3–1.6)Pleomorphic (0.4–0.8 by 1.1–2.0)Rods (0.6 by 2.0)Rods (0.4–0.5 by 1.0–5.0)Ovoid (0.6–0.9 by 1.0–2.0)
ColorYellow-orangeOrange-brownRed-orangePink-redOrange-redRed-pinkOrangePink
Carotenoid in vivo peaks (nm)424, 450, 474430, 458, 485466, 478482, 510, 538464, 491465, 492, 525470510
Bchl a in vivo peaks (nm)800, 867800, 867798, 832, 868800, 858799, 869792, 864800, 869806, 868
DNA G+C content (mol%)68.565.464.270.465–6663.260–6459.6