María José Martínez-Cánovas

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Halomonas ventosae sp, nov. includes three moderately halophilic, exopolysaccharide-producing strains isolated from saline soils in Jaén (south-eastern Spain). These strains can grow anaerobically using either nitrate or nitrite as terminal electron acceptor and hydrolyse both tyrosine and phenylalanine. Their G+C content varies between 72.6 and 74.3 mol%.(More)
Three Halomonas strains, FP34, FP35T and FP36, which were isolated from soil samples taken from Fuente de Piedra, a saline wetland in the province of Málaga in southern Spain, are described. Phylogenetic analyses based on 16S rRNA gene sequences show that the three isolates belong to the genus Halomonas in the gamma-Proteobacteria and form an independent(More)
Halomonas almeriensis sp. nov. is a Gram-negative non-motile rod that was isolated from a saltern in the Cabo de Gata-Níjar wildlife reserve in Almería, south-east Spain. It is moderately halophilic, capable of growth at concentrations of 5-25% w/v sea-salt mixture, the optimum being 7.5% w/v. It is chemo-organotrophic and strictly aerobic, produces(More)
Salipiger mucescens gen. nov., sp. nov. is a moderately halophilic, exopolysaccharide-producing, Gram-negative rod isolated from a hypersaline habitat in Murcia in south-eastern Spain. The bacterium is chemoheterotrophic and strictly aerobic (i.e. unable to grow under anaerobic conditions either by fermentation or by nitrate or fumarate respiration). It(More)
Some members of the moderately halophilic genus Halomonas, such as H. eurihalina, H. maura, H. ventosae and H. anticariensis, produce exopolysaccharides with applications in many industrial fields. We report here that these four species also produce autoinducer molecules that are involved in the cell-to-cell signaling process known as quorum sensing. By(More)
Two bacterial strains, F23T and R22T, have been isolated from hypersaline habitats in Málaga (S. Spain) and Murcia (E. Spain). The novel strains, similar to previously described Idiomarina species, are slightly curved rods, Gram-negative, chemo-organotrophic, strictly aerobic and motile by a single polar flagellum. Both strains produce catalase and oxidase.(More)
Strain B33(T) is a moderately halophilic, exopolysaccharide-producing, Gram-negative, non-motile rod isolated from a hypersaline soil bordering a saline saltern on the Mediterranean seaboard in Murcia (Spain). The bacterium is chemoheterotrophic and strictly aerobic. It contains a pink pigment but does not synthesize bacteriochlorophyll a. It requires 0.66(More)
This study was undertaken to identify exopolysaccharide-producing bacteria gathered from 18 hypersaline habitats. Phenotypic studies performed with 134 isolates revealed the majority of them to be Gram-negative rods with respiratory metabolism, belonging to the genus Halomonas. A numerical analysis of the 114 phenotypic data showed that at an 80% similarity(More)
We have undertaken a polyphasic taxonomic study of two halophilic, Gram-negative bacterial strains, N12(T) and B-100, that produce sulphated exopolysaccharides with biological activity. They were isolated from two different saline soil samples. Both strains grow at NaCl concentrations within the range 3-15 % (w/v) [optimum 5-10 % (w/v)], at 15-37 °C(More)
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