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两株新型种,均从再生水中分离得到。

sp. nov. and sp. nov., two novel species isolated from reclaimed water.

机构信息

Unitat de Microbiologia, Departament de Ciències Mèdiques Bàsiques, Facultat de Medicina i Ciències de la Salut, IISPV, Universitat Rovira i Virgili, Reus, Spain.

出版信息

Int J Syst Evol Microbiol. 2019 Nov;69(11):3326-3331. doi: 10.1099/ijsem.0.003101.

Abstract

Two strains (RW43-9 and RW17-10) recovered from secondary treated wastewater from the Wastewater Treatment Plant (WWTP) in Reus (Spain) were characterized by a polyphasic taxonomic study, showing evidence that they represented two novel species. Based on the 16S rRNA gene for strain RW43-9, the closest relative was LMG 10828 (99.9 % similarity), while for strain RW17-10 it was CECT 7836 (99.4 %). Additionally, multilocus phylogenetic analysis of five concatenated housekeeping genes (, , , and ) showed that the two strains formed separate branches that are different from known species. Whole genome sequences of the two strains (RW43-9 and RW17-10) were obtained and they were compared with those of the type strains of their nearest species. Using average nucleotide identity and DNA-DNA hybridization gave values that were below 96 and 70 %, respectively. These results clearly confirm that they represent novel species. Additionally, the phenotypic characterization of the strains allowed their differentiation from other species. Therefore, the strains are proposed as representing two novel species with the names sp. nov. (type strain RW43-9=CECT 8994=LMG 29062) and sp. nov. (type strain RW17-10=CECT 9140=LMG 29151).

摘要

两株(RW43-9 和 RW17-10)从西班牙雷乌斯污水处理厂(WWTP)二级处理废水中回收,通过多相分类学研究进行了表征,有证据表明它们代表了两个新的种。基于 RW43-9 株的 16S rRNA 基因,最接近的亲缘关系是 LMG 10828(99.9%相似性),而 RW17-10 株的亲缘关系是 CECT 7836(99.4%相似性)。此外,对 5 个串联的看家基因(、、、和)的多位点系统发育分析表明,这两个菌株形成了与已知种不同的单独分支。这两个菌株(RW43-9 和 RW17-10)的全基因组序列被获得,并与它们最接近的种的模式株进行了比较。使用平均核苷酸同一性和 DNA-DNA 杂交得到的数值分别低于 96%和 70%。这些结果清楚地证实它们代表了新的种。此外,菌株的表型特征允许它们与其他种区分开来。因此,提议这两个菌株代表两个新的种,分别命名为 sp. nov.(RW43-9 株=CECT 8994=LMG 29062)和 sp. nov.(RW17-10 株=CECT 9140=LMG 29151)。

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