Falsirhodobacter deserti sp. nov., isolated from sandy soil

Abstract

A Gram-stain-negative, non-motile, heterotrophic, rod-shaped bacterium, designated strain W402T, was isolated from an enrichment culture of a Tamarix ramosissima rhizosphere soil sample from the Xinjiang desert in the PR China. Analysis of the almost-complete 16S rRNA gene sequence showed that the isolate was phylogenetically related to a species of the genus Falsirhodobacter , having a close relationship to Falsirhodobacter halotolerans JA744T (97 % similarity). However, DNA–DNA relatedness between W402T and F. halotolerans JA744T was 43.2±1.2 %. Strain W402T grew in 0–10 % (w/v) NaCl. The temperature and pH ranges for growth were 10–40 °C and pH 5.5–10.0, respectively. Optimal growth occurred at 1–3 % (w/v) NaCl, 30 °C and pH 7.0. The predominant cellular fatty acids were summed feature 8 (C18 : 1ω7c and/or C18 : 1ω6c, 61.4 %), C18 : 0 (9.8 %) and 11-methyl C18 : 1ω7c (8.2 %). The major quinone of strain W402T was Q-10. Phosphatidylethanolamine was predominant in the polar lipid profile. The DNA G+C content of strain W402T was 67.3 mol%. Taken together, these results confirm that W402T represents a novel species of the genus Falsirhodobacter , for which the name Falsirhodobacter deserti sp. nov. is proposed. The type strain is W402T ( = ACCC 05851T = KCTC 32408T).