Maribacter aquimaris sp. nov., isolated from seawater adjacent to Fildes Peninsula, Antarctica

文献类型： 外文期刊

第一作者： Zhang, Yanfeng

作者： Zhang, Yanfeng;Zhai, Yanwu;Mu, Lulu;Hu, Miaomiao;Fang, Wei;Xiao, Yazhong;Fang, Zemin;Zhang, Yanfeng;Zhai, Yanwu;Mu, Lulu;Hu, Miaomiao;Fang, Wei;Xiao, Yazhong;Fang, Zemin;Zhang, Yanfeng

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关键词： Amylase production; Maribacter aquimaris sp; nov; Polyphasic taxonomy; Seawater

期刊名称：ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY （ 影响因子：2.6； 五年影响因子：2.8 ）

ISSN： 0003-6072

年卷期： 2023 年 116 卷 8 期

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收录情况： SCI

摘要： A novel Gram-stain-negative, aerobic, and rod-shaped bacterium with gliding motility, named strain ANRC-HE7(T), was isolated from the seawater of Biological Bay adjacent to Fildes Peninsula, Antarctica. The optimal growth of this strain occurred at 28 degrees C, pH 7.5, and in the presence of 1.0% (w/v) NaCl. Strain ANRC-HE7(T) can produce amylase and harbors gene clusters involved in cellulose degradation. Phylogenetic analysis based on the 16S rRNA gene sequence showed that strain ANRC-HE7(T) formed a distinct lineage within the genus Maribacter and was closely related to Maribacter luteus RZ05(T) (98.4% sequence similarity), Maribacter polysiphoniae LMG 23671(T) (98.3%), and Maribacter arenosus CAU 1321(T) (97.3%). However, digital DNA-DNA hybridization and average nucleotide identity values between strain ANRC-HE7(T) and closely related strains were 17.4-49.1% and 70.9-92.7%, much lower than the cutoff values of 70% and 95%, respectively. On the other hand, strain ANRC-HE7(T) shared characteristics with most type strains within the genus. Its respiratory quinone was MK-6. The major fatty acids were iso-C-15:0, summed feature 3 (C-16:1 omega 7c and/or C-16:1 omega 6c), and anteiso-C-15:0. The major polar lipids were phosphatidylethanolamine, two unidentified aminolipids, four unidentified phospholipids, and five unidentified glycolipids. The DNA G + C content of strain ANRC-HE7(T) was 40.1%. Based on the results of the biochemical, phylogenetic, and chemotaxonomic analyses, strain ANRC-HE7(T) is suggested to represent a novel species of the genus Maribacter, for which the name Maribacter aquimaris sp. nov. is proposed. The type strain is ANRC-HE7(T) (= MCCC 1K03787(T) = KCTC 72532(T)).

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