北京市の廃水処理施設から単離された嚢胞形成性光合成細菌 Rhodocista pekingensis sp. nov. の分類学的特性
A previously undescribed bacterial species, Rhodocista pekingensis sp. nov., was recovered from a municipal wastewater treatment plant in Beijing and subjected to polyphasic taxonomic analysis. The organism is gram-negative, vibrioid to spiral in shape (0.6–0.8 µm wide, 0.8–1.5 µm long), and motile via a single polar flagellum. Phototrophically cultivated cells harbor lamellar photosynthetic membranes and bacteriochlorophyll a, and cultures grown anaerobically display a pink-reddish coloration. Growth occurs either anaerobically under phototrophic conditions or aerobically via chemoheterotrophy. Thiamin and vitamin B12 are required for growth, while biotin is not. Cyst formation is induced when butyrate serves as the sole carbon source. Notably, molecular hydrogen (H2) functions as an electron donor, whereas sulfide and thiosulfate do not. The predominant quinone is Q-9, and the genomic G+C content is 68.8 mol%. The type strain is designated 3-pT (= AS 1.2194T = JCM 11689T).
Molecular hydrogen (H2) serves as an electron donor for this phototrophic bacterium, while sulfide and thiosulfate are not utilized in this capacity, indicating selective electron donor specificity.
This is basic research at the cellular or molecular level. For human application, inhalation is the most promising delivery route, but inhalation carries explosion risk and concentration matters (empirical LFL of 10%; high-concentration devices are not recommended).
See also:
https://h2-papers.org/en/papers/12892135