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Chromohalobacter sarecensis sp. nov., a psychrotolerant moderate halophile isolated from the saline Andean region of Bolivia

Jorge Quillaguamán^1,2, Osvaldo Delgado^1,, Bo Mattiasson¹ and Rajni Hatti-Kaul¹

¹ Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, PO Box 124, SE-221 00 Lund, Sweden
² Centro de Biotecnología, Facultad de Ciencias y Tecnología, Universidad Mayor de San Simón, Cochabamba, Bolivia

Correspondence
Jorge Quillaguamán
Jorge.Quillaguaman{at}biotek.lu.se

A moderately halophilic, aerobic, motile, Gram-negative, rod-shaped bacterium (strain LV4^T) was isolated from saline soil around the lake Laguna Verde in the Bolivian Andes. The organism is a heterotroph, able to utilize various carbohydrates as a carbon source. It showed tryptophan deaminase, oxidase and catalase activity, but was unable to produce indole or H₂S; nitrate was not reduced. The G+C content of the genomic DNA was 56·1 mol%. The pH range for growth was 5–10, temperature range was 0–45 °C and the range of NaCl concentrations was 0–25 % (w/v). On the basis of 16S rRNA gene sequence analysis, strain LV4^T was found to be closely related to Chromohalobacter canadensis DSM 6769^T and Pseudomonas beijerinckii DSM 7218^T; however, its DNA–DNA relatedness with these type strains was low. Strain LV4^T resembled other Chromohalobacter species with respect to various physiological, biochemical and nutritional characteristics but also exhibited differences. Thus, a novel species, Chromohalobacter sarecensis sp. nov., is proposed, with LV4^T (=CCUG 47987^T=ATCC BAA-761^T) as the type strain.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene of strain LV4^T is AY373448.

Transmission electron micrographs of C. sarecensis (strain LV4^T), showing that some of the cells become longer and thinner with increasing size, are available as supplementary figures in IJSEM Online.

Present address: PROIMI-CONICET, Avenida Belgrano y Pasaje, Caseros, 4000 Tucumán, Argentina.

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