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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ghnaya, Tahar Lakhdar, Abelbasset Lutts, Stanley Abdelly, Chedly Zaier, Hanen Ghabriche, Rim Chmingui, Walid |
| Description | Author Affiliation: Zaier H ( Laboratoire des Plantes Extremophiles, Centre de Biotechnologie de Borj-Cédria, BP 901, Hammam Lif, 2050, Tunisia, hanen_zaer@yahoo.fr.) |
| Abstract | The low bioavailability of Pb and low number of Pb-tolerant plant species represent an important limitation for Pb phytoextraction. It was recently suggested that halophyte plant species may be a promising material for this purpose, especially in polluted salt areas while Pb mobility may be improved by synthetic chelating agents. This study aims to evaluate Pb extraction by the halophyte Sesuvium portulacastrum in relation to the impact of EDTA application. Seedling were cultivated during 60 days on Pb artificially contaminated soil (200, 400, and 800 ppm Pb) in the presence or in the absence of EDTA $(3 g kg^{−1}$ soil). Results showed that upon to 400 ppm, Pb had no impact on plant growth. However, exogenous Pb induce a decrease in shoot $K^{+}$ while it increased shoot $Mg^{2+}$ and had no impact on shoot $Ca^{2+}$ concentrations. Lead concentration in the shoots increased with increasing external Pb doses reaching 1,390 ppm in the presence of 800 ppm lead in soil. EDTA addition had no effect on plant growth but strongly increased Pb accumulation in the shoot which increased from 1,390 ppm in the absence of EDTA to 3,772 ppm in EDTA-amended plants exposed to 800 ppm exogenous Pb. Both Pb absorption and translocation from roots to shoots were significantly enhanced by EDTA application, leading to an increase in the total amounts of extracted Pb per plant. These data suggest that S. portulacastrum is very promising species for decontamination of $Pb^{2+}-contaminated$ soil and that its phytoextraction potential was significantly enhanced by addition of EDTA to the polluted soil. |
| ISSN | 09441344 |
| Issue Number | 12 |
| Volume Number | 21 |
| e-ISSN | 16147499 |
| Journal | Environmental Science and Pollution Research |
| Language | English |
| Publisher | Springer |
| Publisher Date | 2014-06-01 |
| Publisher Place | Germany |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Aizoaceae Metabolism Biodegradation, Environmental Edetic Acid Pharmacology Lead Salt-tolerant Plants Soil Pollutants Drug Effects Chelating Agents Plant Roots Seedling Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science Discipline Environmental Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine |
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