Halorubrum Californiense sp. nov., an Extreme Archaeal Halophile Isolated from a Crystallizer Pond at a Solar Salt Plant in California, USA
2008
Pesenti, Peter T. | Sikaroodi, Masoumeh | Gillevet, Patrick M. | Sánchez-Porro Álvarez, Cristina | Ventosa Ucero, Antonio | Litchfield, Carol D. | Universidad de Sevilla. Departamento de Microbiología y Parasitología | Ministerio de Educación y Ciencia (MEC). España
A motile, rod-shaped, pink-pigmented, extremely halophilic archaeon, strain SF3-213T, was isolated from a crystallizer pond at the Cargill Solar Salt Plant, Newark, California (USA). Analysis of the almost-complete 16S rRNA gene sequence showed that the isolate was phylogenetically related to species of the genus Halorubrum, with a close relationship to Halorubrum trapanicum NRC 34021T (98.6% similarity), Halorubrum sodomense ATCC 33755T (98.3 %) and Halorubrum xinjiangense AS 1.3527T (98.2 %). The polar lipids of strain SF3-213T were C20C20 derivatives of phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester, phosphatidylglycerol sulfate and a sulfated diglycosyl-diether. Strain SF3-213T grew in 2.5-5.0 M NaCl. The temperature and pH ranges for growth were 25-42 °C and 6.8-8.5, respectively. Optimal growth occurred at 3.5-4.5 M NaCl, 37 °C and pH 7.3. Mg2+ was required for growth. The DNA G+C content was 69.4 mol%. DNA-DNA hybridization values lower than 70% were obtained between strain SF3-213T and the closely related species of the genus Halorubrum. Based on the data presented in this study, strain SF3-213T represents a novel species for which the name Halorubrum californiense sp. nov. is proposed; the type strain is SF3-213T (=CECT 7256T=DSM 19288T=JCM 14715T).
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