| Title | Ciceribacter ferrooxidans sp. nov., a nitrate-reducing Fe(II)-oxidizing bacterium isolated from ferrous ion-rich sediment |
|---|---|
| Author | Tongchu Deng1,2,3, Youfen Qian2,3, Xingjuan Chen2,3, Xunan Yang2,3, Jun Guo1,2,3, Guoping Sun2,3, and Meiying Xu2,3* |
| Address | 1South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, P. R. China, 2Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, P. R. China, 3State Key Laboratory of Applied Microbiology Southern China, Guangzhou 510070, P. R. China |
| Bibliography | Journal of Microbiology, 58(5),350-356, 2020, |
| DOI | 10.1007/s12275-020-9471-2 |
| Key Words | Ciceribacter, nitrate-reducing Fe(II)-oxidizing bacteria, multilocus sequence analysis, genome analyses, average nucleotide identity |
| Abstract | A nitrate-reducing Fe(II)-oxidizing bacterial strain, F8825T, was isolated from the Fe(II)-rich sediment of an urban creek in Pearl River Delta, China. The strain was Gram-negative, facultative chemolithotrophic, facultative anaerobic, nonspore- forming, and rod-shaped with a single flagellum. Phylogenetic analysis based on 16S rRNA gene sequencing indicated that it belongs to the genus Ciceribacter and is most closely related to C. lividus MSSRFBL1T (99.4%), followed by C. thiooxidans F43bT (98.8%) and C. azotifigens A.slu09T (98.0%). Fatty acid, polar lipid, respiratory quinone, and DNA G + C content analyses supported its classification in the genus Ciceribacter. Multilocus sequence analysis of concatenated 16S rRNA, atpD, glnII, gyrB, recA, and thrC suggested that the isolate was a novel species. DNA–DNA hybridization and genome sequence comparisons (90.88 and 89.86%, for values of ANIm and ANIb between strains F8825T with MSSRFBL1T, respectively) confirmed that strain F8825T was a novel species, different from C. lividus MSSRFBL1T, C. thiooxidans F43bT, and C. azotifigens A.slu09T. The physiological and biochemical properties of the strain, such as carbon source utilization, nitrate reduction, and ferrous ion oxidation, further supported that this is a novel species. Based on the polyphasic taxonomic results, strain F8825T was identified as a novel species in the genus Ciceribacter, for which the name Ciceribacter ferrooxidans sp. nov. is proposed. The type strain is F8825T (= CCTCC AB 2018196T = KCTC 62948T). |