Bardiya Nirmala, Bae Jae-Ho
Department of Environmental Engineering, Inha University, Yonghyun-Dong, Nam-Gu, Inchon-402-751, South Korea.
J Basic Microbiol. 2004;44(2):88-97. doi: 10.1002/jobm.200310320.
The article deals with the novel physiological function of dissimilatory perchlorate reduction by strains JB101 and JB109 isolated from a laboratory-enriched mixed consortium originating from a sewage treatment facility. The biochemical and physiological data of the strains showed good correspondence with members of the family Enterobacteriaceae. The partial 16S rDNA sequence of the strains JB101 and JB109 had similarity of 99.8% to Citrobacter amalonaticus and 98% to Citrobacter farmeri, respectively. The results inferred the possibility of Citrobacter spp. to form an important group of dissimilatory perchlorate reducers among the gamma subclass of Proteobacteria, since the majority of the perchlorate reducers belong to two monophyletic groups, Dechloromonas and Dechlorosoma in beta subclass. The perchlorate-grown Citrobacter strains preferred perchlorate to nitrate as an electron acceptor unlike most of the reported dissimilatory perchlorate reducers.
本文探讨了从源自污水处理设施的实验室富集混合菌群中分离出的菌株JB101和JB109异化还原高氯酸盐的新生理功能。这些菌株的生化和生理数据与肠杆菌科成员表现出良好的对应关系。菌株JB101和JB109的部分16S rDNA序列与无丙二酸柠檬酸杆菌的相似性分别为99.8%，与法氏柠檬酸杆菌的相似性为98%。结果推断，柠檬酸杆菌属有可能在变形菌门γ亚类中形成一个重要的异化高氯酸盐还原菌群体，因为大多数高氯酸盐还原菌属于β亚类中的两个单系群，即脱氯单胞菌属和脱氯瘤菌属。与大多数已报道的异化高氯酸盐还原菌不同，以高氯酸盐培养的柠檬酸杆菌菌株更倾向于以高氯酸盐而非硝酸盐作为电子受体。
