RT Journal Article SR Electronic(1) A1 Zhang, Demin A1 Yang, Huifang A1 Zhang, Wei A1 Huang, Zhiyong A1 Liu, Shuang-JiangYR 2003 T1 Rhodocista pekingensis sp. nov., a cyst-forming phototrophic bacterium from a municipal wastewater treatment plant JF International Journal of Systematic and Evolutionary Microbiology, VO 53 IS 4 SP 1111 OP 1114 DO https://doi.org/10.1099/ijs.0.02500-0 PB Microbiology Society, SN 1466-5034, AB A novel bacterial species, Rhodocista pekingensis sp. nov., was isolated from a municipal wastewater treatment plant and characterized by polyphasic taxonomy. Cells of R. pekingensis were Gram-negative, motile by a single polar flagellum, vibrioid to spiral, 0·6–0·8 μm in width and 0·8–1·5 μm in length. R-bodies were not observed. Phototrophically grown cells contained lamellar photosynthetic membranes and bacteriochlorophyll a. Cell growth was anaerobically phototrophic or aerobically chemoheterotrophic. Anaerobically grown cultures were pink-reddish. Thiamin and vitamin B12, but not biotin, were required for growth and 0·05 % yeast extract stimulated growth. Acetate, lactate, pyruvate and succinate supported growth. Cysts were formed when butyrate was used as the sole carbon source. Molecular hydrogen (H2), but not sulfide or thiosulfate, was used as an electron donor. The major cellular quinone was Q-9. The DNA G+C content of cells was 68·8 mol%. The type strain of Rhodocista pekingensis is 3-pT (=AS 1.2194T =JCM 11669T)., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijs.0.02500-0