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Details

Autor(en) / Beteiligte
Titel
Iodidimonas gelatinilytica sp. nov., aerobic iodide-oxidizing bacteria isolated from brine water and surface seawater
Ist Teil von
  • Antonie van Leeuwenhoek, 2021-05, Vol.114 (5), p.625-631
Ort / Verlag
Cham: Springer International Publishing
Erscheinungsjahr
2021
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
  • Chemo-organotrophic iodide (I − )-oxidizing bacterial strains Hi-2 T and Mie-1 were isolated from iodide-rich natural gas brine water in Chiba and surface seawater in Mie, Japan, respectively. Cells of strains Hi-2 T and Mie-1 were aerobic, Gram-negative and rod-shaped (0.3–0.5 µm width and 1.2–4.4 µm in length). Two isolates grew optimally at 30 °C, pH 7.5 and with 3% NaCl (w/v). Iodide oxidation to form molecular iodine (I 2 ) was a biochemically unique trait for strains Hi-2 T and Mie-1. The major cellular fatty acids are C 18:1 ω 7 c , C 16:1 ω 5 c and C 18:1 2-OH. A phylogenetic analysis based on the 16S rRNA gene sequence revealed that strains Hi-2 T and Mie-1 were located near Iodidimonas muriae C-3 T with 99.2% sequence similarity. The calculated digital DNA–DNA hybridization (dDDH) value of 65.7–65.9% between the two isolates and I. muriae C-3 T was lower than the threshold of 70%, which was used for prokaryotic species delineation. Strains Hi-2 T and Mie-1 differed in the hydrolysis of aesculin, the hydrolysis of gelatin and the major cellular fatty acids composition from I. muriae C-3 T . Considering these biochemical properties, the major cellular fatty acids composition and dDDH value, a novel species is proposed for strains Hi-2 T (= JCM 17844 T  = LMG 28661 T ) and Mie-1 (= JCM 17845 = LMG 28662), to be named Iodidimonas gelatinilytica .

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