title: Bioaugmentation with bacteria selected from the microbiome enhances Arthrocnemum macrostachyum metal accumulation and tolerance.
abstract: A glasshouse experiment was designed to investigate the role of bacterial consortia isolated from the endosphere (CE) and rhizosphere (CR) of Arthrocnemum macrostachyum on its metal uptake capacity and tolerance in plants grown in metal polluted sediments. A. macrostachyum plants were randomly assigned to three bioaugmentation treatments (CE, CR and without inoculation) during 120days. Bioaugmentation with both bacterial consortia enhanced A. macrostachyum capacity to accumulate ions in its roots, while shoot ions concentration only increased with CE treatment. Furthermore bioaugmentation ameliorated the phytotoxicity levels, which was reflected in an increment of plant growth of 59 and 113% for shoots and 52 and 98% for roots with CE and CR treatments, respectively. This effect was supported by bacteria beneficial effect on photochemical apparatus and the modulation of its oxidative stress machinery. These findings indicated that bacteria selected from the microbiome can be claimed to improve A. macrostachyum metal remediation efficiency.
authors.affiliation: Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Sevilla, Calle Profesor García González, 2, 41012 Sevilla, Spain.
authors.forename: Salvadora
authors.initials: S
authors.lastname: Navarro-Torre
authors.affiliation: Departamento de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, 1095, 41012 Sevilla, Spain; IFAPA Centro Las Torres -Tomejil, Ctra Sevilla-Cazalla, km 12,200, 41200 Alcalá del Río, Sevilla, Spain.
authors.forename: José M
authors.initials: JM
authors.lastname: Barcia-Piedras
authors.affiliation: Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Sevilla, Calle Profesor García González, 2, 41012 Sevilla, Spain.
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Caviedes
authors.affiliation: Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Sevilla, Calle Profesor García González, 2, 41012 Sevilla, Spain.
authors.forename: Eloísa
authors.initials: E
authors.lastname: Pajuelo
authors.affiliation: Departamento de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, 1095, 41012 Sevilla, Spain.
authors.forename: Susana
authors.initials: S
authors.lastname: Redondo-Gómez
authors.affiliation: Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Sevilla, Calle Profesor García González, 2, 41012 Sevilla, Spain.
authors.forename: Ignacio D
authors.initials: ID
authors.lastname: Rodríguez-Llorente
authors.affiliation: Departamento de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, 1095, 41012 Sevilla, Spain. Electronic address: emana@us.es.
authors.forename: Enrique
authors.initials: E
authors.lastname: Mateos-Naranjo
mesh_terms: D027703:Amaranthaceae / Q000378:metabolism*; D001419:Bacteria; D001673:Biodegradation, Environmental; D008670:Metals / Q000378:metabolism*; D064307:Microbiota; D058441:Rhizosphere; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D008670:Metals; D012989:Soil Pollutants
keywords: Arthrocnemum macrostachyum; Endophytic bacteria; Metal pollution; PGPB; Phytoremediation; Rhizospheric bacteria