Abstract
A Gram-negative, non-endospore-forming, rod shaped, strictly aerobic, moderately halophilic bacterium, designated strain M9BT, was isolated from the hypersaline lake Aran-Bidgol in Iran. Cells of strain M9BT were found to be motile and produce colonies with an orange-yellow pigment. Growth was determined to occur between 5 and 20 % (w/v) NaCl and the isolate grew optimally at 7.5–10 % (v/w) NaCl. The optimum pH and temperature for growth of the strain were determined to be pH 7.0 and 35 °C, respectively, while it was able to grow over pH and temperature ranges of 6–8 and 25–45 °C, respectively. Phylogenetic analysis based on the comparison of 16S rRNA gene sequences revealed that strain M9BT is a member of the genus Marinobacter. The closest relative to this strain was found to be Marinobacter hydrocarbonoclasticus MBIC 1303T with a similarity level of 97.7 %. DNA–DNA hybridization between the novel isolate and this phylogenetically related species was 13 ± 2 %. The major cellular fatty acids of the isolate were identified as C16:0, C19:1 ω6c, C18:1 ω9c and C16:1 ω9c. The polar lipid pattern of strain M9BT was determined to consist of phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylserine and three phospholipids. Ubiquinone 9 (Q-9) was the only lipoquinone detected. The G+C content of the genomic DNA of this strain was determined to be 58.6 mol%. Phenotypic characteristics, phylogenetic analysis and DNA–DNA relatedness data suggest that this strain represents a novel species of the genus Marinobacter, for which the name Marinobacter persicus sp. nov. is proposed. The type strain of Marinobacter persicus is strain M9BT (=IBRC-M 10445T = CCM 7970T = CECT 7991T = KCTC 23561T).
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Acknowledgments
This work was supported by grants from Iranian Biological Resource Centre (IBRC) (MI-1388-04) (to M.A. Amoozegar), from Spanish Ministerio de Economía y Competitividad (CGL2010-19303) that include European Funds (FEDER), National Science Foundation (Grant DEB-0919290) and Junta de Andalucía (P10-CVI-6226) (to A. Ventosa).
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Bagheri, M., Amoozegar, M.A., Didari, M. et al. Marinobacter persicus sp. nov., a moderately halophilic bacterium from a saline lake in Iran. Antonie van Leeuwenhoek 104, 47–54 (2013). https://doi.org/10.1007/s10482-013-9923-3
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DOI: https://doi.org/10.1007/s10482-013-9923-3