Limoniibacter endophyticus gen. nov., sp nov., an alphaproteobacterium isolated from the roots of Limonium otolepis

摘要

A Gram-negative bacterium, designated as strain YIM 690229(T), was isolated from the roots of Limonium otolepis. The strain was able to grow at 10-40 A degrees C (optimum, 28-37 A degrees C), pH 6.0-8.0 (optimum, 7.0) and in the presence of up to 7% NaCl (w/v) (optimum, up to 2.5%). Comparative 16S rRNA gene sequence analysis revealed that strain YIM 690229(T) shared less than 93.9% sequence similarities with members within the order Rhizobiales, and was remotely related to members of the family Hyphomicrobiaceae. Strain YIM 690229(T) was characterized by the presence of Q-10 as the predominant respiratory lipoquinone. The major fatty acids ( 10%) detected were C-18:1 omega 7c, C-16:0, anteiso-C-15:0 and summed feature 4 (iso-C-17:1 I and/or anteiso-C-17:1 B). The polar lipids consisted of diphosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylmethylethanoamine and two unidentified lipids. The genomic DNA G + C content was 57.2 mol%. Data from this polyphasic taxonomy study suggested that strain YIM 690229(T) should be classified as a new species of a new genus within the family Hyphomicrobiaceae for which the name Limoniibacter endophyticus gen. nov., sp. nov., is proposed. The type species of the genus Limoniibacter gen. nov. is Limoniibacter endophyticus. The type strain of the species Limoniibacter endophyticus sp. nov. is YIM 690229(T) (= KCTC 42097(T) = JCM 30141(T) = CCTCC AB 2014130(T) = CGMCC 1.12906(T)).