Abstract

A novel bacterial strain, designated NA-09T, was isolated from a freshwater sample collected from the Cheonho reservoir, Republic of Korea. Colonies were creamy-white pigmented, translucent, and circular with convex shape. The isolate was Gram-staining negative, strictly aerobic, motile, and rod-shaped. The 16S rRNA gene sequence analysis revealed that strain NA-09T belonged to the genus Arenimonas and showed the highest sequence similarities with Arenimonas malthae CC-JY-1T (95.4%), A. oryziterrae YC6267T (94.9%), A. composti P2-12-1T (94.8%), and A. donghaensis H03-R19T (94.1%). The major fatty acids were iso-C16:0 (20.8%), iso-C15:0 (16.9%), summed feature 1 (13.2%), and iso-C16:1ω7c alcohol (10.2%). The major isoprenoid quinone of the isolate was ubiquionone-8. On the basis of the data from the polyphasic characterization, the strain NA-09T represents a novel species, for which the name Arenimonas aquaticum sp. nov. is proposed (type strain NA-09T =KACC 14663T =NBRC 106550T).

• Keywords: gammaproteobacteria; Arenimonas; freshwater