
Halomonas urmiana sp. nov., a moderately halophilic bacterium isolated from Urmia Lake in Iran
Author(s) -
Shehzad Abid Khan,
Sepideh Zununi Vahed,
Haleh Forouhandeh,
Vahideh Tarhriz,
Nader Chaparzadeh,
Mohammad Amin Hejazi,
Che Ok Jeon
Publication year - 2020
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.0.004005
Subject(s) - biology , halomonas , halophile , bacteria , microbiology and biotechnology , taxonomy (biology) , botany , genetics
In the course of screening halophilic bacteria in Urmia Lake in Iran, which is being threatened by dryness, a novel Gram-negative, moderately halophilic, heterotrophic and short rod-shaped bacteria was isolated and characterized. The bacterium was isolated from a water specimen and designated as TBZ3 T . Colonies were found to be creamy yellow, with catalase- and oxidase-positive activities. The growth of strain TBZ3 T was observed to be at 10–45 °C (optimum, 30 °C), at pH 6.0–9.0 (optimum, pH 7.0) and in the presence of 0.5–20 % (w/v) NaCl (optimum, 7.5 %). Strain TBZ3 T contained C 16 : 0 , cyclo-C 19 : 0 ω8 c , summed feature 3 (comprising C 16 : 1 ω 7 c and/or C 16 : 1 ω 6 c ) and summed feature 8 (comprising C 18 : 1 ω 7 c and/or C 18 : 1 ω 6 c ) as major fatty acids and ubiquinone-9 as the only respiratory isoprenoid quinone. Diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, glycolipid, unidentified phospholipid and unidentified polar lipids were detected as the major polar lipids. Strain TBZ3 T was found to be most closely related to Halomonas saccharevitans AJ275 T , Halomonas denitrificans M29 T and Halomonas sediminicola CPS11 T with the 16S rRNA gene sequence similarities of 98.93, 98.15 and 97.60 % respectively and in phylogenetic analysis strain TBZ3 T grouped with Halomonas saccharevitans AJ275 T contained within a large cluster within the genus Halomonas . Based on phenotypic, chemotaxonomic and molecular properties, strain TBZ3 T represents a novel species of the Halomonas genus, for which the name Halomonas urmiana sp. nov. is proposed. The type strain is TBZ3 T (=DSM 22871 T =LMG 25416 T ).