Aureimonas endophytica sp nov., a novel endophytic bacterium isolated from Aegiceras corniculatum

A Gram-negative, motile, aerobic and coccoid rod-shaped bacterium, designated strain 2T4P-2-4(T), was isolated from a piece of surface-sterilized bark of Aegiceras corniculatum collected from Cotai Ecological Zones in Macao, China, and tested by a polyphasic approach to clarify its taxonomic position. Strain 2T4P-2-4(T) grew optimally without NaCl at 28-30 degrees C, pH 7.0-8.0. The 16S rRNA gene sequence of strain 2T4P-2-4(T) had the highest similarity (96.2 %) to Aureimonas rubiginis CC-CFT034(T). Phylogenetic analysis showed that the strain grouped with species of the genus Aureimonas. The predominant quinone system of strain 2T4P-2-4(T) was ubiquinone 10 (Q-10). The polar lipid profile contained diphosphatidylglycerol, phosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine, sulfoquinovosyldiacylglycerol, phosphatidylmethylethanolamine, two unidentified amino lipids, an unidentified aminophospholipid and five unidentified lipids. The predominant cellular fatty acid was C-18 : 1 omega 7c (61.2 %). The DNA G+C content of strain 2T4P-2-4(T) was 69.8 mol%. Based on the phylogenetic, phenotypic and chemotaxonomic features, strain 2T4P-2-4(T) is a representative of a novel species of the genus Aureimonas, for which the name Aureimonas endophytica sp. nov. is proposed. The type strain of Aureimonas endophytica sp. nov. is 2T4P-2-4(T) (=KCTC 52217(T) = CGMCC 1.15367(T)).