Dyella thiooxydans sp. nov., a facultatively chemolithotrophic, thiosulfate-oxidizing bacterium isolated from rhizosphere soil of sunflower (Helianthus annuus L.)

Abstract

A Gram-negative, aerobic, motile, rod-shaped, thiosulfate-oxidizing bacterium, designated ATSB10T, was isolated from rhizosphere soil of sunflower (Helianthus annuus L.). Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain ATSB10T was closely related to members of the genera Dyella (96.4–98.1 % 16S rRNA gene sequence similarity) and Luteibacter (96.4–97.0 %) and Fulvimonas soli LMG 19981T (96.7 %) and Frateuria aurantia IFO 3245T (97.8 %). The predominant fatty acids were iso-C16 : 0, iso-C17 : 1 ω9c and iso-C15 : 0. The major quinone was Q-8. The G+C content of the genomic DNA was 66.0 mol%. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, phosphatidyldimethylethanolamine, an unknown phospholipid, unknown aminophospholipids and an unknown aminolipid. On the basis of phenotypic properties, phylogenetic distinctiveness and DNA–DNA relatedness, strain ATSB10T represents a novel species in the genus Dyella, for which the name Dyella thiooxydans sp. nov. is proposed. The type strain is ATSB10T (=KACC 12756T =LMG 24673T).