Rhodovulum

Rho.do' vu.lum. Gr. n. rhodon rose; L. dim. n. ovulum small egg; M.L. neut. n. Rhodovulum small red egg. Proteobacteria / Alphaproteobacteria / Rhodobacterales / Rhodobacteraceae / Rhodovulum Cells are ovoid to rod shaped, are motile by means of flagella or nonmotile, and divide by binary fission. Gram negative; belong to the Alphaproteobacteria . Phototrophically grown cells form vesicular internal photosynthetic membranes. Photosynthetic pigments are bacteriochlorophyll a (esterified with phytol) and carotenoids of the spheroidene series. The color of phototrophic cultures is yellow-green to yellow-brown, while aerobic cultures are pink to red. Ubiquinone 10 is the major quinone. Major fatty acids are C 18:1 (predominant), C 18:0 , and C 16:0 . The mol% G + C of the DNA is: 62.1–73.2. Type species: Rhodovulum sulfidophilum (Hansen and Veldkamp 1973) Hiraishi and Ueda 1994a, 21 (Rhodopseudomonas sulfidophila Hansen and Veldkamp 1973, 55; Rhodobacter sulfidophilus Imhoff, Trüper, and Pfennig 1984, 342.