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dc.contributor.author Armendariz, Ana Laura
dc.contributor.author Talano, Melina Andrea
dc.contributor.author Wevar Oller, Ana Laura
dc.contributor.author Medina, Maria Ines
dc.contributor.author Agostini, Elizabeth
dc.date.available 2018-09-17T13:41:14Z
dc.date.issued 2015-01
dc.identifier.citation Armendariz, Ana Laura; Talano, Melina Andrea; Wevar Oller, Ana Laura; Medina, Maria Ines; Agostini, Elizabeth; Effect of arsenic on tolerance mechanisms of two plant growth-promoting bacteria used as biological inoculants; Science Press; Journal of Environmental Sciences; 33; 1-2015; 203-210
dc.identifier.issn 1001-0742
dc.identifier.uri http://hdl.handle.net/11336/59829
dc.description.abstract Bacterial ability to colonize the rhizosphere of plants in arsenic (As) contaminated soils is highly important for symbiotic and free-living plant growth-promoting rhizobacteria (PGPR) used as inoculants, since they can contribute to enhance plant As tolerance and limit metalloid uptake by plants. The aim of this work was to study the effect of As on growth, exopolysaccharide (EPS) production, biofilm formation and motility of two strains used as soybean inoculants, Bradyrhizobium japonicum E109 and Azospirillum brasilense Az39. The metabolism of arsenate (As(V)) and arsenite (As(III)) and their removal and/or possible accumulation were also evaluated. The behavior of both bacteria under As treatment was compared and discussed in relation to their potential for colonizing plant rhizosphere with high content of the metalloid. B. japonicum E109 growth was reduced with As(III) concentration from 10. μM while A. brasilense Az39 showed a reduction of growth with As(III) from 500. μM. EPS and biofilm production increased significantly under 25. μM As(III) for both strains. Moreover, this was more notorious for Azospirillum under 500. μM As(III), where motility was seriously affected. Both bacterial strains showed a similar ability to reduce As(V). However, Azospirillum was able to oxidize more As(III) (around 53%) than Bradyrhizobium (17%). In addition, both strains accumulated As in cell biomass. The behavior of Azospirillum under As treatments suggests that this strain would be able to colonize efficiently As contaminated soils. In this way, inoculation with A. brasilense Az39 would positively contribute to promoting growth of different plant species under As treatment.
dc.format application/pdf
dc.language.iso eng
dc.publisher Science Press
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject ACCUMULATION
dc.subject ARSENIC
dc.subject BIOFILM
dc.subject COLONIZATION
dc.subject EXOPOLYSACCHARIDES
dc.subject PLANT GROWTH-PROMOTING RHIZOBACTERIA
dc.subject.classification Otras Ciencias Biológicas
dc.subject.classification Ciencias Biológicas
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Effect of arsenic on tolerance mechanisms of two plant growth-promoting bacteria used as biological inoculants
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2018-09-04T16:28:16Z
dc.journal.volume 33
dc.journal.pagination 203-210
dc.journal.pais China
dc.description.fil Fil: Armendariz, Ana Laura. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Biología Molecular; Argentina
dc.description.fil Fil: Talano, Melina Andrea. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Biología Molecular. Sección Química Biológica; Argentina
dc.description.fil Fil: Wevar Oller, Ana Laura. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Biología Molecular. Sección Química Biológica; Argentina
dc.description.fil Fil: Medina, Maria Ines. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Biología Molecular; Argentina
dc.description.fil Fil: Agostini, Elizabeth. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Biología Molecular; Argentina
dc.journal.title Journal of Environmental Sciences
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1001074215001618
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jes.2014.12.024
dc.conicet.fuente individual


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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)