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Salicola salis sp. nov., an extremely halophilic bacterium isolated from Ezzemoul sabkha in Algeria

¹ Departamento de Microbiologia, Facultad de Farmacia, Universidad de Granada, Campus Universitario de Cartuja s/n, CP 18071 Granada, Spain
² Institut de Nutrition de l'Alimentation et des Technologies Agro-Alimentaires, Université Mentouri Constantine, Algeria
³ Institut des Sciences de la Nature, Faculté des Sciences, Université Mentouri Constantine, Algeria

Correspondence
Mercedes Monteoliva-Sánchez
mmonteol{at}ugr.es

A novel, extremely halophilic bacterium was isolated from brine samples collected from Ezzemoul sabkha in north-east Algeria. Cells of this isolate, designated B2^T, were Gram-negative, rod-shaped and motile. Growth occurred between 10 and 25 % (w/v) NaCl and the isolate grew optimally at 15–20 % (w/v) NaCl. The pH range for growth was 6.0–9.0 with an optimum at pH 7.0–7.5. The predominant fatty acids were C_{16 : 0} and C_{18 : 1}9c. Other fatty acids present were C_{16 : 1}9c, C_{18 : 0} 10-methyl, C_{12 : 0} 3-OH, C_{10 : 0} and C_{12 : 0}. The G+C content of the genomic DNA was 56.0 mol%. 16S rRNA gene sequence analysis indicated that strain B2^T was closely related to Salicola marasensis in the Gammaproteobacteria. The level of 16S rRNA gene sequence similarity between strain B2^T and the type strain of Salicola marasensis was 99 %. DNA–DNA hybridization experiments between strain B2^T and Salicola marasensis indicated a level of relatedness of 52 %. The phenotypic characteristics of strain B2^T allowed its differentiation from recognized species of the genus Salicola. Strain B2^T was able to hydrolyse starch but not aesculin. It was unable to use carbohydrates and could not use citrate, pyruvate or succinate as sole carbon and energy sources. On the basis of the polyphasic data presented, strain B2^T is considered to represent a novel species of the genus Salicola, for which the name Salicola salis sp. nov. is proposed. The type strain is B2^T (=CECT 7106^T=LMG 23122^T).

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