Roseicella aquatilis sp. nov., isolated from freshwater lake

A novel Gram-stain-negative, non-motile, ellipsoidal-shaped, red-pigmented, facultatively aerobic strain designated NE82(T) was isolated from mud sample from Jiugongli Lake in Inner Mongolia Autonomous Region, China. Optimal growth occurred at 28-33 degrees C (range 15-42 degrees C) and pH 7.0-7.5 (range 5.5-8.5) with 0% (w/v) NaCl (range 0-1.0%). Cells of strain NE82(T) were 0.4-0.9 mu m in diameter, catalase-positive and oxidase-negative. Q-10 was the sole respiratory quinone and the major cellular fatty acids (> 10%) in strain NE82(T) were summed feature 8 (C-18:1 omega 7c and C-18:1 omega 6c). The polar lipids of strain NE82(T) were phosphatidylethanolamine, phosphatidylcholine, phosphatidylglycerol, an unidentified aminophospholipid and four unidentified phospholipids. The G+C content of the genomic DNA was 72.0 mol%. Based on the 16S rRNA gene sequence, strain NE82(T) showed the highest similarity (97.2%) to Roseicella frigidaeris DB1506(T) within the family Acetobacteraceae, thus representing a novel species of the genus Roseicella, for which the name Roseicella aquatilis sp. nov. is proposed. The type strain is NE82(T) (= KCTC 62412(T) = MCCC 1H00292(T)).

Automated summary

A novel species of the genus Roseicella, named Roseicella aquatilis sp. nov., was isolated from mud sample in Jiugongli Lake, Inner Mongolia Autonomous Region, China. The strain NE82(T) has unique characteristics and 97.2% 16S rRNA gene sequence similarity to Roseicella frigidaeris DB1506(T).