Dechloromonas aquae sp. nov., A Novel Species Isolated from Aquaculture Water of Grass Carp

文献类型： 外文期刊

第一作者： Wei, Hehong

作者： Wei, Hehong;Yao, Ying;Ding, Bingqing;Geng, Yamin;Gao, Na;Liu, Yaqi;Liu, Yaqi;Sun, Yangyang;Dai, Jingcheng;Sun, Si

作者机构：

期刊名称：CURRENT MICROBIOLOGY （ 影响因子：2.6； 五年影响因子：2.6 ）

ISSN： 0343-8651

年卷期： 2025 年 82 卷 4 期

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收录情况： SCI

摘要： A novel bacterial strain, designated Dechloromonas aquae ZY10T, was isolated from the aquaculture water of grass carp. The colonies exhibited diameters ranging from approximately 1 to 3 mm and were characterized by a creamy-white coloration, circular shape, smooth texture, translucency, and a convex profile. The cells were facultatively anaerobic and motile, utilizing a single polar flagellum for movement. They were rod-shaped, reproduced through binary fission, and were identified as Gram-negative, oxidase-negative, and catalase-positive. Optimal growth was observed between 37 and 40 degrees C, within a pH range of 7.0-9.0, and at a NaCl concentration of 0% (w/v). The respiratory quinone was ubiquinone-8 (97.6%) and ubiquinone-7 (2.4%), and the major polar lipids were phosphatidylethanolamine (PE), aminophospholipid (APL), diphosphatidylglycerol (DPG), and phosphatidylglycerol (PG). Phylogenetic analysis based on 16S rRNA gene sequences suggested that ZY10T formed a lineage within the genus Dechloromonas and showed the highest 16S rRNA gene sequence similarity to "D. hankyongensis" XY25T (96.5%), followed by D. denitrificans ED1T (96.4%), D. hortensis MA-1T (96.1%) and D. agitata CKBT (96.0%) and Azonexus. caeni Slo-05T (95.5%). The predominant fatty acids of ZY10T were summed feature 3 (comprising C16:1 omega 6c and/or C16:1 omega 7c) and C16:0. The whole genome of ZY10T was 3,568,927 bp in size, including 3,275 protein-coding genes, 72 tRNA genes, and 15 rRNA genes, and the genomic DNA G + C content was 62.0 mol%. The orthologous average nucleotide identity, average amino acid identity, and digital DNA-DNA hybridization values between ZY10T and other species within the family Azonexaceae were 78.0-81.5%, 71.8-73.9%, and 20.3-23.0%, respectively. Therefore, based on phenotypic, chemotaxonomic, and phylogenetic analyses, the isolated ZY10T (= MCCC 1K08699T = KCTC 72749 T) is proposed as type strain of the novel species Dechloromonas aquae sp. nov.

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