Nitratireductor alexandrii sp. nov., from phycosphere microbiota of toxic marine dinoflagellate Alexandrium tamarense

文献类型： 外文期刊

第一作者： Jiang, Zhiwei

作者： Jiang, Zhiwei;Duan, Yuhan;Yao, Bing;Zeng, Teer;Feng, Qi;Qi, Min;Yang, Qiao;Zhang, Xiaoling;Yang, Xi;Yang, Qiao;Wang, Xiaoyan;Yang, Qiao;Zhang, Xiaoling

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关键词： Alexandrium tamarense; algae-ssociated bacteria; Nitratireductor alexandrii sp. nov; phycosphere microbiota; toxic marine dinoflagellate

期刊名称：INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY （ 影响因子：2.747； 五年影响因子：2.889 ）

ISSN： 1466-5026

年卷期： 2020 年 70 卷 7 期

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收录情况： SCI

摘要： A taxonomic study was carried out on a novel algae-associated bacterial strain Z3-1(T), which was isolated from phycosphere micro-biota of toxic marine dinoflagellate Alexandrium tamarense 880. Cells of strain Z3-1(T) were Gram-stain-negative, rod-shaped and strictly aerobic and were motile by means of flagella. Strain Z3-1(T) grew at 25-42 degrees C, pH 5.0-10.0 and 1.0-5.0 % (w/v) NaCl. Strain Z3-1(T) reduced nitrate to nitrite, but did not reduce nitrite to nitrogen gas. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain Z3-1(T) belongs to the genus Nitratireductor showing the highest sequence similarity (97.0 %) to Nitratireductor basaltis JCM 14935(T). The average nucleotide identity and digital DNA-DNA hybridization relatedness between strain Z3-1(T) and type strains of genus Nitratireductor with available genome sequences were in the ranges of 72.4-74.4 % and 22.7-23.3 %, respectively. The major fatty acids were summed in feature 8 (C-18:1 omega 7c and/or C-18:1 omega 6c), C-19:0 omega 8c cyclo, C-18:1 omega 7c 11-metyl and iso-C-17:0. The major polar lipids were determined as diphosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine, phosphatidylglyc-erol, two unidentified phospholipids and four unidentified polar lipids. The genomic DNA G+C content calculated from genome sequence was 65.6 mol%. Based on genotypic, chemotaxonomic and phenotypic data obtained, strain Z3-1(T) represents a novel species of the genus Nitratireductor, for which the name Nitratireductor alexandrii sp. nov. is proposed with the type strain Z3-1(T) (=KCTC 62458(T)=CCTCC AB 2017227(T)).

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