title: Scouting contaminated estuaries: heavy metal resistant and plant growth promoting rhizobacteria in the native metal rhizoaccumulator Spartina maritima.
abstract: Spartina maritima is a native endangered heavy metal rhizoaccumulator cordgrass naturally growing in southwest coasts of Spain, where is used as a biotool to rehabilitate degraded salt marshes. Fifteen bacterial strains were isolated from the rhizosphere of S. maritima growing in the estuary of the Tinto River, one of the most polluted areas in the world. A high proportion of bacteria were resistant towards several heavy metals. They also exhibited multiple plant growth promoting (PGP) properties, in the absence and the presence of Cu. Bacillus methylotrophicus SMT38, Bacillusaryabhattai SMT48, B. aryabhattai SMT50 and Bacilluslicheniformis SMT51 were selected as the best performing strains. In a gnobiotic assay, inoculation of Medicago sativa seeds with the selected isolates induced higher root elongation. The inoculation of S. maritima with these indigenous metal-resistant PGP rhizobacteria could be an efficient method to increase plant adaptation and growth in contaminated estuaries during restoration programs.
authors.affiliation: Departamento de Microbiología, Facultad de Farmacia, Universidad de Sevilla, C/Profesor García González 2, 41012 Sevilla, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Mesa
authors.affiliation: Departamento de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes s/n, 41012 Sevilla, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Mateos-Naranjo
authors.affiliation: Departamento de Microbiología, Facultad de Farmacia, Universidad de Sevilla, C/Profesor García González 2, 41012 Sevilla, Spain.
authors.forename: M A
authors.initials: MA
authors.lastname: Caviedes
authors.affiliation: Departamento de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes s/n, 41012 Sevilla, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Redondo-Gómez
authors.affiliation: Departamento de Microbiología, Facultad de Farmacia, Universidad de Sevilla, C/Profesor García González 2, 41012 Sevilla, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Pajuelo
authors.affiliation: Departamento de Microbiología, Facultad de Farmacia, Universidad de Sevilla, C/Profesor García González 2, 41012 Sevilla, Spain. Electronic address: irodri@us.es.
authors.forename: I D
authors.initials: ID
authors.lastname: Rodríguez-Llorente
mesh_terms: D001419:Bacteria / Q000378:metabolism; D063366:Estuaries; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism*; D063245:Plant Development; D018517:Plant Roots / Q000378:metabolism; D006109:Poaceae / Q000254:growth & development / Q000378:metabolism* / Q000382:microbiology; D058441:Rhizosphere; D045483:Rivers / Q000737:chemistry; D013030:Spain; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*; D053833:Wetlands
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical
keywords: Estuary restoration; Heavy metal contamination; Phytostabilisation; Plant growth promoting bacteria; Spartina maritima; Tinto River