Screening beneficial rhizobacteria from Spartina maritima for phytoremediation of metal polluted salt marshes: comparison of gram-positive and gram-negative strains
| Autor: | Eloísa Pajuelo, Bouchra Doukkali, Enrique Mateos-Naranjo, Karina I. Paredes-Páliz, Miguel A. Caviedes, Ignacio D. Rodríguez-Llorente |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Salinity Health Toxicology and Mutagenesis Gram-positive bacteria 010501 environmental sciences Gram-Positive Bacteria Poaceae Rhizobacteria 01 natural sciences Arsenic 03 medical and health sciences Metals Heavy Gram-Negative Bacteria Botany Environmental Chemistry 0105 earth and related environmental sciences Rhizosphere biology Pantoea General Medicine biology.organism_classification Pollution Pantoea agglomerans Phytoremediation Biodegradation Environmental 030104 developmental biology Spain Wetlands Estuaries Spartina maritima Bacteria |
| Zdroj: | Environmental Science and Pollution Research. 23:19825-19837 |
| ISSN: | 1614-7499 0944-1344 |
| DOI: | 10.1007/s11356-016-7184-1 |
| Popis: | The aim of our work was the isolation and characterization of bacteria from the rhizosphere of Spartina maritima in the metal contaminated Odiel estuary (Huelva, SW Spain). From 25 strains, 84 % were identified as gram-positive, particularly Staphylococcus and Bacillus. Gram-negative bacteria were represented by Pantoea and Salmonella. Salt and heavy metal tolerance, metal bioabsorption, plant growth promoting (PGP) properties, and biofilm formation were investigated in the bacterial collection. Despite the higher abundance of gram-positive bacteria, gram-negative isolates displayed higher tolerance toward metal(loid)s (As, Cu, Zn, and Pb) and greater metal biosorption, as deduced from ICP-OES and SEM-EDX analyses. Besides, they exhibited better PGP properties, which were retained in the presence of metals and the ability to form biofilms. Gram-negative strains Pantoea agglomerans RSO6 and RSO7, together with gram-positive Bacillus aryabhattai RSO25, were selected for a bacterial consortium aimed to inoculate S. maritima plants in metal polluted estuaries for phytoremediation purposes. |
| Databáze: | OpenAIRE |
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