Tonolla M, Demarta A, Peduzzi R, Hahn D
Cantonal Institute of Bacteriology, Microbial Ecology (University of Geneva), CH-6904 Lugano, Switzerland.
Appl Environ Microbiol. 1999 Mar;65(3):1325-30. doi: 10.1128/AEM.65.3.1325-1330.1999.
Comparative sequence analysis of a 16S rRNA gene clone library from the chemocline of the meromictic Lake Cadagno (Switzerland) revealed the presence of a diverse number of phototrophic sulfur bacteria. Sequences resembled those of rRNA of type strains Chromatium okenii DSM169 and Amoebobacter purpureus DSM4197, as well as those of four bacteria forming a tight cluster with A. purpureus DSM4197 and Lamprocystis roseopersicina DSM229. In situ hybridization with fluorescent (Cy3 labeled) oligonucleotide probes indicated that all large-celled phototrophic sulfur bacteria in the chemocline of Lake Cadagno were represented by C. okenii DSM169, while small-celled phototrophic sulfur bacteria consisted of four major populations with different distribution profiles in the chemocline indicating different ecophysiological adaptations.
对瑞士卡达尼奥半咸水湖化学分层带的16S rRNA基因克隆文库进行的比较序列分析表明,存在多种光合硫细菌。序列与奥氏着色菌DSM169型菌株和紫红红杆菌DSM4197的rRNA序列相似,也与四种细菌的序列相似,这四种细菌与紫红红杆菌DSM4197和玫瑰色发光囊菌DSM229形成紧密聚类。用荧光(Cy3标记)寡核苷酸探针进行原位杂交表明,卡达尼奥湖化学分层带中所有大细胞光合硫细菌均由奥氏着色菌DSM169代表,而小细胞光合硫细菌由四个主要种群组成,它们在化学分层带中具有不同的分布模式,表明具有不同的生态生理适应性。