Prospects of Miscanthus x giganteus for PAH phytoremediation: A microcosm study
| Autor: | Bennasroune Amar, Henry Sonia, Técher Didier, D’Innocenzo Marielle, Laval-Gilly Philippe, Falla Jairo, Martinez-Chois Claudia |
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| Přispěvatelé: | Laboratoire des Interactions Ecotoxicologie, Biodiversité, Ecosystèmes (LIEBE), Université Paul Verlaine - Metz (UPVM)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
2. Zero hunger
0303 health sciences Rhizosphere Industrial crop Bioaugmentation 010501 environmental sciences 15. Life on land Phenanthrene 01 natural sciences Biostimulation 03 medical and health sciences chemistry.chemical_compound Phytoremediation Bioremediation Agronomy chemistry [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology Microcosm Agronomy and Crop Science ComputingMilieux_MISCELLANEOUS 030304 developmental biology 0105 earth and related environmental sciences [SDV.EE.IEO]Life Sciences [q-bio]/Ecology environment/Symbiosis |
| Zdroj: | Industrial Crops and Products Industrial Crops and Products, Elsevier, 2012, 36 (1), pp.276-281. ⟨10.1016/j.indcrop.2011.10.030⟩ |
| ISSN: | 0926-6690 |
| DOI: | 10.1016/j.indcrop.2011.10.030⟩ |
| Popis: | Phytoremediation of large surface areas using crop cultivation appears as an attractive strategy to allow for long-term but economically viable site rehabilitation programs. The contribution of Miscanthus x giganteus root exudates to the biostimulation of PAH degradation was recently demonstrated using in vitro assays. The aim of this work was to characterize the phytoremediation potential of this perennial grass in the situation of PAH polluted soils. For this purpose, three factors affecting bioremediation, namely the nature of soil organic contaminants (spiked phenanthrene and pyrene each at 100 mg/kg dry soil), bioaugmentation (with a PAH-degrading microflora) and planting (with Miscanthus x giganteus), were arranged according to a full factorial design in pot experiments. Effects of each factor (alone or in combination) were assessed on soil bacterial communities (total culturable bacteria and PAH-degrader enumerations, 16S rDNA molecular diversity analysis) and PAH dissipation. Results showed that contamination was the main factor positively influencing the development of degrader populations. Phenanthrene dissipation was observed regardless the presence of plants or initial PAH-degrading bacterial inoculum whereas significant decreases in pyrene contents were positively influenced by bioaugmentation and to a lesser extent by planting. The ability of plants to maintain a degrading rhizosphere microflora thus enhancing the dissipation of recalcitrant compounds in polluted soils would deserve further investigations. |
| Databáze: | OpenAIRE |
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