Imhoff, Johannes F. (2021) Pararhodospirillum . In: Bergey's Manual of Systematics of Archaea and Bacteria. . Wiley, Chichester, pp. 1-7. DOI 10.1002/9781118960608.gbm02003.

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Abstract

Pa.ra.rho.do.spi.ril'lum. Gr. pref. para-, beside, alongside of, near, like; N.L. neut. n. Rhodospirillum, a bacterial generic name; N.L. neut. n. Pararhodospirillum, resembling Rhodospirillum.

Proteobacteria / Alphaproteobacteria / Rhodospirillales / Rhodospirillaceae / Pararhodospirillum

Pararhodospirillum species are spiral-shaped, mesophilic, and phototrophic freshwater bacteria of the Rhodospirillaceae family. Cells are motile by polar flagella, and photosynthetic pigments are located in internal photosynthetic membranes present as lamellar stacks. Photosynthetic pigments are bacteriochlorophyll a and carotenoids of the spirilloxanthin series with spirilloxanthin itself lacking. Ubiquinone-9 and rhodoquinone-9 are the major quinones. All species are sensitive to oxygen and require anoxic or microoxic conditions for growth. They grow photoheterotrophically under anoxic conditions in the light. Photoautotrophic growth, aerobic chemotrophic growth, and fermentative growth have not been demonstrated. Growth factors are required.

DNA G + C content (mol%): 60.2–65.8 (Bd and HPLC) and 64.7–67 (GA).

Type species: Pararhodospirillum photometricum Lakshmi et al. 2014VP (basonym: Rhodospirillum photometricum Molisch 1907AL).

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