sp. nov., isolated from rhizosphere soil of in a mangrove.

A novel, Gram-stain-positive, aerobic, non-spore-forming, non-motile and irregular rod-shaped bacterium designated Q22 was isolated from the rhizosphere soil of mangrove plant, collected in Zhangzhou, Fujian province, China. Strain Q22 was able to grow at 10-40 °C (optimum 30 °C), pH 5.5-9.0 (optimum 7.0-8.0) and with 0-5.0% (w/v) NaCl (optimum 1.0 %). The genomic DNA G+C content was 71.9%. The average nucleotide identity, and DNA-DNA hybridization values between strain Q22 and the reference strains were 79.7-88.9% and 22.6-37.4%, respectively. The predominant isoprenoid quinone was MK-12 and the major fatty acids were o-C, -C and -C. The major polar lipids of strain Q22 were diphosphatidylglycerol, phosphatidylglycerol, one glycolipid and three unidentified lipids. The strain Q22 contained 2,4-diaminobutyric acid, alanine acid, glutamic acid and glycine in the peptidoglycans. The phylogenetic analysis and genotypic features, along with the phenotypic and chemotaxonomic characteristics, indicate that strain Q22 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is Q22 (=MCCC 1K03340= KCTC 39961).