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

Abstract

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 R32T grew 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 R32T shared the highest similarities with Mesonia oceanica (98.3 %), followed by Salegentibacter salarius (93.0 %), Salegentibacter mishustinae (92.8 %), Salegentibacter salegens (92.5 %) and Mesonia maritima (92.4 %). The dominant fatty acids were iso-C15 : 0 (32.7 %) and iso-C17 : 0 3-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 R32T and the Salegentibacter and Mesonia species were 70.5–85.8 % and 18.7–30.5 %, respectively. Based on the results of the polyphasic characterization, strain R32T is considered to represent a novel species of the genus Mesonia , for which the name Mesonia hitae sp. nov. is proposed. The type strain is R32T (=MCCC 1A09780T=KCTC 72004T).

Mesonia profundi sp. nov., isolated from deep-sea sediment of the Mariana Trench

“…Differential characteristics between strain MT50 T and its closely related strains Strains: 1, MT50 T (data from this study); 2, Mesonia ostreae KCTC 23500 T (data from this study and data indicated by * from[5]); 3, Mesonia algae KMM 3909 T (data from[3]); 4, Mesonia aquimarina IMCC1021 T (data from[7]); 5, Mesonia maritimus 15-S14-6 T (data from[8]; 6, Mesonia mobilis KMM 6059 T (data from[6]); 7, Mesonia sediminis MF326 T (data from[10]). All strains are negative for hydrolysis of starch and positive for oxidase and hydrolysis of Tweens 20 and 60.…”

“…The genus Mesonia, belonging to the family Flavobacteriaceae [1], phylum Bacteroidota [2], was originally proposed by Nedashkovskaya et al [3] with the type species being Mesonia algae [3]. Currently, the genus Mesonia consists of 10 validly published species (https://lpsn.dsmz.de/genus/Mesonia) [4], which were isolated from seawater [5][6][7][8][9] or polymeric organic matter rich marine environments, such as seaweed and aquacultural environments [3,[10][11][12][13]. Members of Mesonia are characterized as aerobic or facultatively anaerobic, rod-shaped, non-flagellated bacteria, with menaquinone-6 (MK-6) as the predominant respiratory quinone [3].…”