F. Ruiz‐Berraquero

Universidad de Sevilla

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António Ventosa

Universidad de Sevilla

A. Ramos‐Cormenzana

Universidad de Granada

Joaquı́n J. Nieto

Universidad de Sevilla

Francisco Rodríguez‐Valera

Universitat de Miguel Hernández d'Elx

Antonio J. Palomares

Universidad de Sevilla

Emilia Quesada

Czech Academy of Sciences, Institute of Biotechnology

M. C. Gutiérrez

University of Queensland

Manuel Megı́as

Universidade de Vigo

R. Fernández-Castillo

Universidad de Sevilla

Miguel A. Caviedes

Universidad de Sevilla

Cooperative Institutions

Universidad de Sevilla

Consejo Superior de Investigaciones Científicas

Universidad de Granada

Hungarian Academy of Sciences

Universidad de Salamanca

Institute of Genetics

Institut des Sciences du Végétal

Universitat Jaume I

University of Ottawa

Biomedal (Spain)

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Accumulation of Poly (β-Hydroxybutyrate) by Halobacteria

Applied and Environmental Microbiology (1986)

R. Fernández-Castillo Francisco Rodríguez‐Valera J. Gonzalez-Ramos F. Ruiz‐Berraquero

Some species of extremely halophilic archaebacteria, Halobacteriaceae , have been shown to accumulate large amounts of poly (β-hydroxybutyrate) under conditions of nitrogen limitation and abundant carbon source. The production of poly (β-hydroxybutyrate), at least in large quantities, was restricted to two carbohydrate-utilizing species, Halobacterium mediterranei and H. volcanii. In addition to the nutrients in the media, the salt concentration also influenced poly (β-hydroxybutyrate) accumulation, which was greater at lower salt concentrations. The possible application of these microorganisms for the production of biodegradable plastics is discussed.

Halobacterium

Haloarchaea

Haloferax volcanii

Halobacteriaceae

10.1128/aem.51.1.214-216.1986

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Citations (171)

Relationship between amino acid production and phosphate-dissolving capacity of bacteria

Folia Microbiologica (1977)

F. Ruiz‐Berraquero A. Ramos‐Cormenzana

Aspartic acid

Alanine

Glutamic acid

Amino acid synthesis

10.1007/bf02876992

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Citations (1)

Numerical Taxonomy of Moderately Halophilic Gram-negative Rods

Microbiology (1982)

António Ventosa Emilia Quesada Francisco Rodríguez‐Valera F. Ruiz‐Berraquero A. Ramos‐Cormenzana

A study was made of 516 randomly selected isolates of moderately halophilic bacteria from solar salterns showing salinities between 8·8 and 40·0% (w/v) total salts, located in S.E. Spain. After purification, many cytological, physiological, biochemical, nutritional and antibiotic sensitivity characters were determined for 106 selected saltern isolates and two reference strains. Data were coded and analysed by numerical techniques using the Jaccard coefficient (SJ ), and clusters of strains were obtained by average linkage (UPGMA) analysis. Nine major phenons were found at the 72·5% similarity level. The properties of each phenon are given, their taxonomic affinities are discussed, and typical reference strains are suggested. Almost all the strains were related to genera known to contain marine species. A large number of the strains could be tentatively assigned to the genus Vibrio, suggesting that this may be an abundant taxon of moderately halophilic Gram-negative rods in solar salterns.

Numerical taxonomy

UPGMA

Jaccard index

Gram

Halotolerance

10.1099/00221287-128-9-1959

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Citations (517)

The susceptibility of the moderate halophile Vibrio costicola to heavy metals

Journal of Applied Bacteriology (1987)

M. Teresa García Joaquı́n J. Nieto António Ventosa F. Ruiz‐Berraquero

Fifty‐eight strains of the moderate halophile Vibrio costicola , including both culture collection strains and freshly isolated strains from solar salterns, were examined for their susceptibility to 10 heavy metal ions by using an agar dilution technique. All strains were sensitive to cadmium, copper, silver, zinc and mercury. This latter ion showed the highest activity even at 0·05 mmol/1 metal concentration. On the other hand, all strains were similarly tolerant to lead, and a great proportion of them were also tolerant to nickel (91%) and chromium (88%). Only 44% and 14% of them showed tolerance to arsenate and cobalt, respectively. The majority of strains (96·4%) were multiply metal‐tolerant, with three different metal ion tolerances as the major pattern.

Mercury

10.1111/j.1365-2672.1987.tb02418.x

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Citations (18)

Action ofN-methyl-N′-nitro-N-nitrosoguanidine inRhizobium trifolii

Current Microbiology (1985)

Manuel Megı́as Miguel A. Caviedes Francisco Rodríguez‐Quiñones Antonio J. Palomares F. Ruiz‐Berraquero

Acriflavine

Methylnitronitrosoguanidine

10.1007/bf01567891

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Citations (0)

Volcaniella eurihalina gen. nov., sp. nov., a Moderately Halophilic Nonmotile Gram-Negative Rod

International Journal of Systematic Bacteriology (1990)

Emilia Quesada María José Valderrama Victoria Béjar António Ventosa M. C. Gutiérrez

A comparison of 16 gram-negative moderately halophilic aerobic rod-shaped bacteria with other halophilic and nonhalophilic gram-negative bacteria supported the establishment of Volcaniella eurihalina gen. nov., sp. nov. This comparison included phenotypic properties, salt requirements, and guanine-plus-cytosine contents of the DNAs, as well as DNA-DNA homology studies. The distinguishing features of this new bacterial genus are as follows: The organisms are nonmotile short rods that are oxidase negative; they are aerobic with a strictly respiratory type of metabolism; they are moderate halophiles, optimal growth occurs at a total salt concentration of 7.5% (wt/vol), and they exhibit a strongly euryhaline character; and they have a specific requirement for Na+ ions (sodium can be supplied as NaCl, Na2SO4, or NaBr). The minimum NaCl concentration required is 1.5% (wt/vol). The guanine-plus-cytosine content of the DNA is 59.1 to 65.7 mol%. This organism was isolated from hypersaline habitats, including saline soils and salt ponds, and from seawater. The type strain is strain F9-6 (= ATCC 49336).

Cytosine

Euryhaline

Gram

10.1099/00207713-40-3-261

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Citations (105)

Deleya halophila, a New Species of Moderately Halophilic Bacteria

International Journal of Systematic Bacteriology (1984)

Emilia Quesada António Ventosa F. Ruiz‐Berraquero A. Ramos‐Cormenzana

Deleya halophila sp. nov., which was isolated from hypersaline soils, is proposed. Each of 38 isolates, together with 8 reference strains, was examined in 97 phenotypic tests, and the data were analyzed by numerical taxonomy procedures. The 38 isolates formed a distinct group at a 76% similarity value, as determined by an analysis performed with the simple matching coefficient and unweighted average linkage clustering. Characteristically, the isolates were aerobic, gram-negative rods that were motile by one to eight peritrichous flagella. They grew optimally in the presence of 7.5% (wt/vol) marine salts. The distinguishing features of the new species are its salt requirement, biochemical features, and nutritional versatility. The guanine-plus-cytosine content of the deoxyribonucleic acid is 66.7 mol%. The type strain of this species is strain F5-7 (= CCM 3662).

Strain (injury)

Numerical taxonomy

Cytosine

10.1099/00207713-34-3-287

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Citations (181)

Ability of O-anisate degrading microorganisms to come tabolize dicamba and other related herbicides

Chemosphere (1985)

M.R. Ferrer Ana del Moral F. Ruiz‐Berraquero A. Ramos‐Cormenzana

Dicamba

Cometabolism

Mecoprop