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Paracoccus salsus sp. nov., a novel slightly halophilic bacterium isolated from saline lake sediment

文献类型： 外文期刊

作者： Gao, Lei 1 ; Fang, Bao-Zhu 1 ; Liu, Yong-Hong 1 ; Huang, Yin 1 ; Wang, Shuang 5 ; Jiang, Hong-Chen 6 ; Li, Wen-Jun 1 ;

作者机构： 1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China

2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

3.Sun Yat Sen Univ, Sch Life Sci, State Key Lab Biocontrol, Guangdong Prov Key Lab Plant Resources, Guangzhou 510275, Guangdong, Peoples R China

4.Sun Yat Sen Univ, Sch Life Sci, Southern Marine Sci & Engn Guangdong Lab Zhuhai, Guangzhou 510275, Guangdong, Peoples R China

5.Heilongjiang Acad Agr Sci, Heilongjiang Acad Black Soil Conservat & Utilizat, Harbin 150086, Peoples R China

6.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Beijing 100083, Peoples R China

关键词： Paracoccus salsus sp. nov; Symphony Lake sediments; paracoccus; polyphasic taxonomy

期刊名称：INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY （ 影响因子：2.689； 五年影响因子：2.925 ）

ISSN： 1466-5026

年卷期： 2022 年 72 卷 8 期

页码：

收录情况： SCI

摘要： A Gram- stain-negative, non-motile, slightly halophilic and non- endospore-forming alphaproteobacterium, designated strain EGI L200073(T), was isolated from saline lake sediment sampled in Xinjiang Uygur Autonomous Region, China. The taxonomic position of the isolate was determined using the polyphasic taxonomic analysis and phylogenomic analysis. Phylogenetic analysis based on 16S rRNA gene sequence similarities indicated that strain EGI L200073(T) formed a distinct clade with Paracoccus seriniphilus DSM 14827(T) and shared sequence identity of 98.56 %. The novel isolate could be distinguished from other species of the genus Paracoccus by its distinct phenotypic, physiological and genotypic characteristics. Optimal growth of strain EGI L200073(T) occurred on marine agar 2216 at pH 8.0 and 30 ?. The major respiratory quinone was Q-10, while the major fatty acids (> 10%) were summed feature 8 (C-17:1 omega 6c and/or C-17: 1 omega 7c) and C-18:0. The detected polar lipids included diphosphatidylglycerol, phosphatidylcholine and phosphatidylglycerol. Based on the genome sequence of strain EGI L200073(T), the G+C content of the novel isolate was 65.7 mol%. The average nucleotide identity, amino acid identity and digital DNA-DNA hybridization values of strain EGI L200073(T) against related members in the genus Paracoccus were below the cut -off points proposed for delineation of a novel species. According our polyphasic taxonomic data, strain EGI L200073(T) represents a new species of the genus Paracoccus, for which the name Paracoccus salsus sp. nov. is proposed. The type strain of the proposed novel isolate is EGI L200073(T) (=KCTC 92045(T)=CGMCC 1.19242(T)).

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