Open AccessDeinococcus lacus sp. nov., a gamma radiation-resistant bacterium isolated from an artificial freshwater pond
Author(s) -
Miri Park,
Jaeho Song,
Gi Gyun Nam,
Yochan Joung,
Lei Zhao,
Min Kyu Kim,
Jang-Cheon Cho
Publication year - 2018
Publication title -
international journal of systematic and evolutionary microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 173
eISSN - 1466-5034
pISSN - 1466-5026
DOI - 10.1099/ijsem.0.002683
Subject(s) - biology , bacteria , botany , ecology , microbiology and biotechnology , paleontology
A Gram-stain-negative, pink-coloured, non-motile and gamma radiation-resistant bacterium, designated strain IMCC1711 T , was isolated from a freshwater sample collected from an artificial pond (Inkyong Pond). The 16S rRNA gene sequence analysis showed that strain IMCC1711 T was most closely related to Deinococcus piscis 3ax T (94.2 %) and formed a robust phylogenetic clade with other species of the genus Deinococcus. Optimal growth of strain MCC1711 T was observed at 25 °C and pH 7.0 without NaCl. Strain IMCC1711 T exhibited high resistance to gamma radiation. The DNA G+C content of strain IMCC1711 T was 59.1 mol% and MK-8 was the predominant isoprenoid quinone. Major fatty acid constituents of the strain were C17 : 1ω8c, C16 : 0, summed feature 3 (C16 : 1ω6c and/or C16 : 1ω7c) and C15 : 1ω6c. The major polar lipids constituted phosphatidylethanolamine, one unidentified phosphoglycolipid and two unidentified glycolipids. On the basis of taxonomic data obtained in this study, it was concluded that strain IMCC1711 T represented a novel species of the genus Deinococcus, for which the name Deinococcus lacus sp. nov. is proposed. The type strain of Deinococcus lacus is IMCC1711 T (KCTC 52494 T =KACC 18979 T =NBRC 112440 T ).