Limnobacter alexandriisp. nov., a thiosulfate-oxidizing, heterotrophic and EPS-bearingBurkholderiaceaeisolated from cultivable phycosphere microbiota of toxicAlexandrium catenellaLZT09
文献类型： 外文期刊
作者： Duan, Yuhan 1 ; Jiang, Zhiwei 1 ; Wu, Zheng 1 ; Sheng, Zhi 3 ; Yang, Xi 2 ; Sun, Jingya 1 ; Zhang, Xiaoling 1 ; Yang, Qia 1 ;
作者机构： 1.Zhejiang Ocean Univ, Dept Environm Sci & Engn, ABI Grp, GPM Project, Zhoushan 316022, Peoples R China
2.Guangdong Acad Agr Sci, Inst Anim Sci, Guangzhou 510640, Peoples R China
3.Hubei Univ Technol, Hubei Prov Cooperat Innovat Ctr Ind Fermentat, Natl Ctr Cellular Regulat & Mol Pharmaceut 111, Key Lab Fermentat Engn,Minist Educ, Wuhan 430068, Peoples R China
4.Zhoushan Municipal Ctr Dis Control & Prevent, Key Lab Hlth Risk Factors Seafood Zhejiang Prov, Zhoushan 316021, Peoples R China
关键词： Phycosphere microbiota; Limnobacter alexandriisp; nov; Alexandrium catenella; Toxic marine dinoflagellates; Bioactive exopolysaccharides; Thiosulfate-oxidizing
期刊名称：ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY （ 影响因子：2.271； 五年影响因子：2.707 ）
ISSN： 0003-6072
年卷期： 2020 年 113 卷 11 期
页码：
收录情况： SCI
摘要： A novel Gram-negative, aerobic, motile and short rod-shaped bacterium with exopolysaccharides production, designated as LZ-4(T), was isolated from cultivable phycosphere microbiota of harmful algal blooms-causing marine dinoflagellateAlexandrium catenellaLZT09 which produces paralytic shellfish poisoning toxins. Strain LZ-4(T)was able to use thiosulfate (optimum concentration 10 mM) as energy source for bacterial growth. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain LZ-4(T)belonged to the genusLimnobacter, showing high 16S rRNA gene sequences similarities withL. thiooxidansDSM 13612(T)(99.4%),L. humiNBRC 11650(T)(98.2%) andL. litoralisNBRC 105857(T)(97.2%), respectively. The average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values between LZ-4(T)andL. thiooxidansDSM 13612(T)were 78.9 and 21.9%, respectively. Both values were far lower than the thresholds (95-96% for ANI and 70% for dDDH) generally accepted for new species delineation. The respiratory quinone of strain LZ-4(T)was Q-8. The dominant cellular fatty acids were determined as summed feature 3 (C-16:1 omega 6c/omega 7c), summed feature 8 (C-18:1 omega 6c/omega 7c) and C-16:0. Polar lipids profile consisted of diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, two unidentified aminolipids and three unidentified polar lipids. The genomic DNA G+C content of strain LZ-4(T)was 52.5 mol%. Based on polyphasic characterization, strain LZ-4(T)represents a novel species of the genusLimnobacter, for which the nameLimnobacter alexandriisp. nov. is proposed. The type strain is LZ-4(T)(=CCTCC AB 2019004(T) =KCTC 72281(T)).
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