Aeromicrobium panacisoli sp. nov. Isolated from Soil of Ginseng Cultivating Field.

Abstract

A Gram-positive, rod-shaped, non-spore-forming, and aerobic bacterium (Gsoil 137T) was isolated from soil of a ginseng field of Pocheon province in South Korea and subjected to a polyphasic approach in order to determine its taxonomic position. On the basis of 16S rRNA gene sequence similarity, strain Gsoil 137T was shown to belong to the family Nocardioidaceae and was closely related to Aeromicrobium ginsengisoli Gsoil 098T (96.7%), Aeromicrobium panaciterrae (96.7%), and Aeromicrobium halocynthiae JCM 15749T (96.6%). Being phylogenetic, it was most closely related to Aeromicrobium halocynthiae JCM 15749T. The G+C content of the genomic DNA was 70.3mol%. The diagnostic diamino acid of the cell wall peptidoglycan was LL-diaminopimelic acid. The predominant menaquinone was menaquinone MK-8 (H4) and MK-7 (H4) was a minor compound. The major cellular fatty acids were C14:0, C16:0, C18:1 ω9c and summed feature 4 (C16:1 ω7c/C15:0 iso 2-OH). All these data supported the affiliation of strain Gsoil 137T to the genus Aeromicrobium. The results of physiological and biochemical tests enabled strain Gsoil 137T to be differentiated genotypically and phenotypically from currently known Aeromicrobium species. Therefore, strain Gsoil 137T represents a novel species of the genus Aeromicrobium, for which the name Aeromicrobium panacisoli sp. nov. is proposed. The type strain is Gsoil 137T (= KCTC 19130T = DSM 17940T = CCUG 52475T).