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Abstract

Three bacterial strains were isolated from different saline soils in Spain. The novel strains were moderately halophilic, exopolysaccharide-producing, Gram-negative, non-motile rods. The strains required NaCl and grew best with 7.5−10 % (w/v) NaCl in the medium. They formed wax-coloured colonies, were oxidase-positive and showed respiratory metabolism, using oxygen, nitrate and nitrite as terminal electron acceptors. The novel strains were able to denitrify and did not produce acid from sugars. The DNA G+C contents varied between 62.7 and 66.2 mol%. Phylogenetic analyses based on 16S rRNA gene sequences and sequence signatures of this gene showed that all three novel isolates belonged to the genus in the class and formed an independent phylogenetic line. The most phylogenetically related species were , and , with which the novel strains showed 16S rRNA gene sequence similarity values of between 96.3 and 95.2 %. The principal fatty acids of the novel strains were 16 : 0, 18 : 17, 16 : 17 and 19 : 0 cyclo 8. The predominant respiratory lipoquinone was ubiquinone with nine isoprene units (Q-9). The name sp. nov. is proposed for these isolates. The type strain is SP4 (=CECT 7282=LMG 24145).

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2008-04-01
2019-10-21
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