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  • Title: Halomonas aestuarii sp. nov., a moderately halophilic bacterium isolated from a tidal flat.
    Author: Koh HW, Rani S, Kim SJ, Moon E, Nam SW, Rhee SK, Park SJ.
    Journal: Int J Syst Evol Microbiol; 2017 Nov; 67(11):4298-4303. PubMed ID: 28126041.
    Abstract:
    Strain Hb3T was isolated from a tidal flat in Jeollabuk-do Gunsan, Republic of Korea. Cells were Gram-stain-negative, oxidase- and catalase-positive, rod-shaped and motile. The strain grew optimally at 25-35 °C, at pH 6.0-6.5 and with 3.0-10.0 % (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain Hb3T belonged to the genus Halomonas. Strain Hb3T was related most closely to Halomonas ventosae Al12T (98.6 % 16S rRNA gene sequence similarity), Halomonas denitrificans M29T (98.6 %) and Halomonas saccharevitans AJ275T (98.4 %). Moreover, multilocus sequence analysis using the gyrB, rpoD and secA genes supported the phylogenetic position of strain Hb3T. The genomic G+C content of strain Hb3T was 67.9 mol%. DNA-DNA hybridization values for strain Hb3T versus H. ventosae Al12T, H. denitrificans M29T and H. saccharevitans AJ275T were 38.0, 54.5 and 47.4 %, respectively. The major quinone was ubiquinone Q-9 and the major fatty acids were C18 : 1ω7c, summed feature 3 (C16 : 1ω6c and/or C16 : 1ω7c), C16 : 0 and C19 : 0 cyclo ω8c. Diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, amino lipid, six unidentified phospholipids and an unidentified lipid comprised the polar lipid profile. On the basis of the data presented in this report, strain Hb3T represents a novel species of the genus Halomonas. The name Halomonas aestuarii sp. nov. is proposed for this novel species. The type strain is Hb3T (=KCTC 52253T=JCM 31415T).
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