Niastella gongjuensis sp. nov., isolated from greenhouse soil

Abstract

An aerobic, Gram-stain-negative, non-flagellated, long rod or rod-shaped bacterial strain, 5GH22-11T, was isolated from a soil sample of a greenhouse in Gongju, Republic of Korea. According to 16S rRNA gene sequence analysis, strain 5GH22-11T showed the highest sequence similarities with Niastella populi THYL-44T (97.1 %), Niastella koreensis GR20-10T (95.7 %) and Niastella yeongjuensis GR20-13T (95.6 %), and < 93 % sequence similarity with all other species with validly published names. The phylogenetic tree also showed strain 5GH22-11T formed a compact cluster with members of the genus Niastella. DNA–DNA hybridization revealed strain 5GH22-11T is a novel species, showing far less than 70 % DNA–DNA relatedness with Niastella populi THYL-44T. Strain 5GH22-11T contained iso-C15 : 0 (34.3 %), iso-C17 : 0 3-OH (24.8 %) and iso-C15 : 1 G (18.2 %) as the major fatty acids; phosphatidylethanolamine, six unknown aminolipids, two unknown lipids and one unknown phospholipid as the polar lipids; and MK-7 as the predominant isoprenoid quinone. The DNA G+C content was 41.4 mol%. Based on these phylogenetic, physiological and chemotaxonomic data, it was demonstrated that strain 5GH22-11T represents a novel species of the genus Niastella, for which the name Niastella gongjuensis sp. nov. is proposed. The type strain is 5GH22-11T ( = KACC 17399T = JCM 19941T).