1. Mangrovibacterium diazotrophicum gen. nov., sp. nov., a nitrogen-fixing bacterium isolated from a mangrove sediment, and proposal of Prolixibacteraceae fam. nov
- Author
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Lingyun Qu, Yu Juan Liu, Yanying Zhang, Junde Dong, Xiao-Fang Huang, Xin-Peng Tian, Si Zhang, and Fa-Zuo Wang
- Subjects
DNA, Bacterial ,China ,Geologic Sediments ,Molecular Sequence Data ,Biology ,Microbiology ,Genus ,Phylogenetics ,Nitrogen Fixation ,RNA, Ribosomal, 16S ,Botany ,Phospholipids ,Phylogeny ,Ecology, Evolution, Behavior and Systematics ,Base Composition ,Phylogenetic tree ,Strain (chemistry) ,Bacteroidetes ,Fatty Acids ,Vitamin K 2 ,General Medicine ,Ribosomal RNA ,16S ribosomal RNA ,Genes, Bacterial ,Wetlands ,GenBank ,Nitrogen fixation ,Oxidoreductases - Abstract
A nitrogen-fixing bacterium, designated strain SCSIO N0430T, was isolated from a mangrove sediment sample. Analysis of the sequence of the nifH gene responsible for nitrogen fixation in this strain indicated a close relationship to an uncultured bacterium ZNZ-D11 (GenBank accession no. JF896696). 16S rRNA gene sequence analysis revealed that this isolate had less than 93 % similarity to its closest relative, Sunxiuqinia elliptica DQHS4T. A phylogenetic tree reconstructed based on 16S rRNA gene sequences revealed that strain SCSIO N0430T was a member of the phylum Bacteroidetes . Chemotaxonomic and physiological characteristics, including phospholipids and major fatty acids, readily distinguished the isolate from established members of the phylum Bacteroidetes . It is concluded that strain SCSIO N0430T represents a novel genus and species, for which the name Mangrovibacterium diazotrophicum gen. nov., sp. nov. is proposed, with the type strain of the species SCSIO N0430T ( = KCTC 32129T = DSM 27148T = JCM 19152T). Based on phylogenetic characteristics and 16S rRNA gene signature nucleotide patterns, the three genera Sunxiuqinia , Prolixibacter and Mangrovibacterium are proposed to make up a novel family, Prolixibacteraceae fam. nov., in the order Bacteroidales .
- Published
- 2014