Mesonia hitae sp. nov., isolated from the seawater of the South Atlantic Ocean

• DOI: 10.1099/ijsem.0.004911
• Publication Date: 2021-08-17T16:17:40Z
• Authors: Ying Zhou; Xiujun Gao; Jingjing Xu; Guizhen Li; Rui Ma; Peisheng Yan; Chunming Dong; Zongze Shao
• Keywords: DNA, Bacterial; Base Composition; 0303 health sciences; Fatty Acids; Vitamin K 2; Sequence Analysis, DNA; Bacterial Typing Techniques; 03 medical and health sciences; RNA, Ribosomal, 16S; Seawater; Atlantic Ocean; Flavobacteriaceae; Phylogeny

A Gram-negative, non-motile, non-spore-forming, aerobic and short rod-shaped bacterial strain R32T, was isolated from seawater of the South Atlantic Ocean. Strain R32Tgrew at 10–40 °C (optimum 28 °C), at pH 6.0–8.0 (optimum 7.0), and in the presence of 3–8 % NaCl (w/v) (optimum 5 %). Cells were oxidase- and catalase-positive. The 16S rRNA gene sequence of strain R32Tshared the highest similarities withMesonia oceanica(98.3 %), followed bySalegentibacter salarius(93.0 %),Salegentibacter mishustinae(92.8 %),Salegentibacter salegens(92.5 %) andMesonia maritima(92.4 %). The dominant fatty acids were iso-C15 : 0(32.7 %) and iso-C17 : 03-OH (21.1 %). Menaquinone-6 (MK-6) was detected as the sole respiratory quinone. The polar lipids found were phosphatidylethanolamine, three aminolipids and three unidentified lipids. The DNA G+C content was 35.0 mol%. The ANI value and dDDH value between strain R32Tand theSalegentibacterandMesoniaspecies were 70.5–85.8 % and 18.7–30.5 %, respectively. Based on the results of the polyphasic characterization, strain R32Tis considered to represent a novel species of the genusMesonia, for which the nameMesonia hitaesp. nov. is proposed. The type strain is R32T(=MCCC 1A09780T=KCTC 72004T).