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How do low doses of desferrioxamine B and EDTA affect the phytoextraction of metals in sunflower?

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorCORNU, Jean-Yves
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorDEPERNET, Clément
hal.structure.identifierProcessus de Transfert et d'Echanges dans l'Environnement - EA 3819 [PROTEE]
dc.contributor.authorGARNIER, C.
hal.structure.identifierProcessus de Transfert et d'Echanges dans l'Environnement - EA 3819 [PROTEE]
dc.contributor.authorLENOBLE, Véronique
hal.structure.identifierLaboratoire de Planétologie et Géodynamique [UMR 6112] [LPG]
hal.structure.identifierUniversité de Nantes [UN]
dc.contributor.authorBRAUD, A.
hal.structure.identifierLaboratoire de Planétologie et Géodynamique [UMR 6112] [LPG]
hal.structure.identifierUniversité de Nantes [UN]
dc.contributor.authorLEBEAU, T.
dc.date.accessioned2024-04-08T12:09:55Z
dc.date.available2024-04-08T12:09:55Z
dc.date.issued2017
dc.identifier.issn0048-9697
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196598
dc.description.abstractEnThe aim of this study was to compare the efficiency of siderophore desferrioxamine B (DFOB) and EDTA in increasing the phytoextraction of metals in sunflower. A 28-day pot experiment was conducted in a metal-contaminated soil supplied with 200μmolkg(-1) of DFOB or EDTA. Pore water was collected and pseudo-polarographic analyses were conducted to assess the impact of the two chelators on the mobility and speciation of metals in the liquid phase. Our results showed that DFOB is not an efficient mobilizing agent of divalent metals in soil. Adding DFOB selectively increased the mobility of trivalent metals while the supply of EDTA simultaneously increased the mobility of both trivalent and divalent metals. EDTA significantly reduced the labile fractions of Cd, Cu, (Pb) and Zn measured in the porewater. The labile concentration of Cd and Zn measured in presence of EDTA was even less than that measured in the control. As expected from the pore water analysis, the addition of DFOB did not affect the phytoextraction of any divalent metals. In contrast, the addition of EDTA enhanced Cu and Ni phytoextraction in sunflower 2.0 to 2.8 fold for Cu and 1.3 to 2.3 fold for Ni, depending on the cultivar. This result supports different hypotheses regarding the forms and the related pathways in which metals are taken up in presence of EDTA. Based on the results obtained for Ni, whose uptake is rate limited by its internalization across the cell membrane, the direct uptake of metal-EDTA complexes via the non-selective apoplastic pathway is hypothesized to contribute the most to the overall uptake of metals in presence of EDTA, even added at "low" concentrations.
dc.language.isoen
dc.publisherElsevier
dc.subject.enbetween-cultivar variability
dc.subject.encomplexation
dc.subject.enphytoavailability
dc.subject.enpseudo-polarography
dc.subject.ensoil
dc.subject.enbacterial siderophore
dc.title.enHow do low doses of desferrioxamine B and EDTA affect the phytoextraction of metals in sunflower?
dc.typeArticle de revue
dc.identifier.doi10.1016/j.scitotenv.2017.03.092
dc.subject.halSciences du Vivant [q-bio]
dc.subject.halSciences de l'environnement/Environnement et Société
bordeaux.journalScience of the Total Environment
bordeaux.page535-545
bordeaux.volume592
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-01603942
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01603942v1
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