Zhilina T N, Zavarzin G A, Rainey F A, Pikuta E N, Osipov G A, Kostrikina N A
Institute of Microbiology, Russian Academy of Sciences, Moscow, Russia.
Int J Syst Bacteriol. 1997 Jan;47(1):144-9. doi: 10.1099/00207713-47-1-144.
A new alkaliphilic, sulfate-reducing bacterium, strain Z-7935T (T = type strain), was isolated from a soda-depositing lake, Lake Magadi in Kenya. This organism is a motile vibrio which utilizes only hydrogen and formate as electron donors and sulfate, sulfite, and thiosulfate, but not sulfur, as electron acceptors. Thiosulfate is dismutated. Strain Z-7935T is an obligately sodium-dependent alkaliphile which grows in sodium carbonate medium and does not grow at pH 7; the maximum pH for growth is more than pH 10, and the optimum pH is 9.5 to 9.7. The optimum NaCl concentration for growth is 3% (wt/vol). The optimum temperature for growth is 37 degrees C. The G + C content of the DNA is 48.6 mol%. 16S ribosomal DNA sequence analysis revealed that strain Z-7935T represents a new lineage with genus status in the delta subclass of the Proteobacteria. The name Desulfonatronovibrio hydrogenovorans gen. nov., sp. nov. is proposed for this organism; the type strain of D. hydrogenovorans is strain Z-7935 (= DSM 9292).
从肯尼亚的马加迪湖（一个苏打沉积湖）中分离出了一种新的嗜碱硫酸盐还原菌，菌株Z-7935T（T = 模式菌株）。该菌为运动性弧菌，仅利用氢气和甲酸盐作为电子供体，以硫酸盐、亚硫酸盐和硫代硫酸盐作为电子受体，但不能利用单质硫。硫代硫酸盐会发生歧化反应。菌株Z-7935T是一种严格依赖钠的嗜碱菌，能在碳酸钠培养基中生长，在pH 7时不能生长；生长的最高pH值超过10，最适pH值为9.5至9.7。生长的最适NaCl浓度为3%（重量/体积）。生长的最适温度为37℃。DNA的G + C含量为48.6 mol%。16S核糖体DNA序列分析表明，菌株Z-7935T代表变形菌门δ亚纲中一个具有属地位的新谱系。为此种生物提议命名为嗜氢脱磺弧菌（Desulfonatronovibrio hydrogenovorans），属名nov.，种名nov.；嗜氢脱磺弧菌的模式菌株是菌株Z-7935（= DSM 9292）。
