Undibacterium cyanobacteriorum sp. nov., an auxin-producing bacterium isolated from fresh water during cyanobacterial bloom period

Ve Van Le, So-Ra Ko, Loan Thi Thanh Nguyen, Jin-Cheol Kim, Yuna Shin, Kyunghyun Kim, Chi-Yong Ahn
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Abstract

A novel Gram-negative, white-pigmented, and auxin-producing strain, 20NA77.5T, was isolated from fresh water during cyanobacterial bloom period. Pairwise comparison of the 16S rRNA gene sequences showed that strain 20NA77.5T belonged to the genus Undibacterium and exhibited the highest sequence similarity to the type strains of Undibacterium danionis (98.00%), Undibacterium baiyunense (97.93%), Undibacterium macrobrachii (97.92%), and Undibacterium fentianense (97.71%). The average nucleotide identity (ANI) and digital DNA–DNA hybridization (dDDH) values between strain 20NA77.5T and its related type strains were below 79.93 and 23.80%, respectively. The predominant fatty acids (> 10% of the total fatty acids) were C16:0 and summed feature 3 (C16:1ω7c and/or C16:1ω6c). The genomic DNA G + C content of strain 20NA77.5T was found to be 48.61%. Based on the phylogenetic distinctness, chemotaxonomic features, and phenotypic features, strain 20NA77.5T is considered to represent a novel species of the genus Undibacterium, for which the name Undibacterium cyanobacteriorum sp. nov is proposed. The type strain is 20NA77.5T (= KCTC 8005T = LMG 33136T).

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在蓝藻藻华期从淡水中分离出的一种产素细菌--Undibacterium cyanobacteriorum sp.
在蓝藻藻华期间,从淡水中分离到一株新型革兰氏阴性、白色色素、产辅助素的菌株20NA77.5T。16S rRNA基因序列的配对比较结果表明,20NA77.5T菌株属于蓝藻分支杆菌属(Undibacterium),与蓝藻分支杆菌(Undibacterium danionis)(98.00%)、蓝藻分支杆菌(Undibacterium baiyunense)(97.93%)、蓝藻分支杆菌(Undibacterium macrobrachii)(97.92%)和蓝藻分支杆菌(Undibacterium fentianense)(97.71%)的模式菌株序列相似度最高。20NA77.5T菌株与其相关类型菌株的平均核苷酸同一性(ANI)和数字DNA-DNA杂交(dDDH)值分别低于79.93%和23.80%。主要脂肪酸(占总脂肪酸的 10%以上)为 C16:0 和总特征 3(C16:1ω7c 和/或 C16:1ω6c)。菌株 20NA77.5T 的基因组 DNA G + C 含量为 48.61%。根据系统发育的独特性、化学分类学特征和表型特征,认为菌株 20NA77.5T 代表了 Undibacterium 属的一个新种,并将其命名为 Undibacterium cyanobacteriorum sp.nov。模式菌株为 20NA77.5T (= KCTC 8005T = LMG 33136T)。
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来源期刊
CiteScore
5.60
自引率
11.50%
发文量
104
审稿时长
3 months
期刊介绍: Antonie van Leeuwenhoek publishes papers on fundamental and applied aspects of microbiology. Topics of particular interest include: taxonomy, structure & development; biochemistry & molecular biology; physiology & metabolic studies; genetics; ecological studies; especially molecular ecology; marine microbiology; medical microbiology; molecular biological aspects of microbial pathogenesis and bioinformatics.
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