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Halomonas boliviensis sp. nov., an alkalitolerant, moderate halophile isolated from soil around a Bolivian hypersaline lake

Jorge Quillaguamán^1,2, Rajni Hatti-Kaul¹, Bo Mattiasson¹, Maria Teresa Alvarez^1,3 and Osvaldo Delgado^1,

¹ Department of Biotechnology, Centre 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
³ Instituto de Investigaciones Farmaco Bioquímicas, Universidad Mayor de San Andrés, La Paz, Bolivia

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

Halomonas boliviensis sp. nov. is proposed for two moderately halophilic, psychrophilic, alkalitolerant bacteria, LC1^T (=DSM 15516^T=ATCC BAA-759^T) and LC2 (=DSM 15517=ATCC BAA-760), both of which were isolated from a soil sample around the lake Laguna Colorada, located at 4300 m above sea level in the south-west region of Bolivia. The bacteria are aerobic, motile, Gram-negative rods that produce colonies with a cream pigment. Moreover, they are heterotrophs that are able to utilize various carbohydrates as carbon sources. The organisms reduce nitrate and show tryptophan deaminase activity. The genomic DNA G+C contents were 51·4 mol% for isolate LC1^T and 52·6 mol% for isolate LC2. Based on 16S rDNA sequence analysis, isolates LC1^T and LC2 were identified as members of the genus Halomonas and clustered closely with Halomonas variabilis DSM 3051^T and Halomonas meridiana DSM 5425^T. However, DNA–DNA relatedness between the new isolates and the closest related Halomonas species was low.

The GenBank/EMBL/DDBJ accession numbers for the 16S rDNA sequences of isolates LC1^T and LC2 are AY245449 and AY245450, respectively.

A table showing differential characteristics of H. boliviensis from other Halomonas species and micrographs of H. boliviensis strains are available as supplementary material in IJSEM Online.

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

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