Chelate-enhanced phytoextraction and phytostabilization of lead-contaminated soils by carrot (Daucus carota)

Ebrahim Babaeian, Mehdi Homaee, Rasoul Rahnemaie

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


The objective of this study was to study the influence of different ethylenediamine tetraacetate (EDTA), nitrilotriacetic acid (NTA) and oxalic acid (HOx) concentrations on tolerance and lead (Pb) accumulation capacity of carrot (Daucus carota). The results indicated that by increasing Pb, NTA and HOx concentrations in the soil, the shoot, taproot and capillary root dry matters increase effectively. In contrary, EDTA caused to reduce capillary roots biomass. EDTA was more effective than NTA and HOx in solubilizing soil Pb. The highest Pb content in shoots (342.2 ± 13.9 mg kg−1) and taproots (301 ± 15.5 mg kg−1) occurred in 10 mM EDTA, while it occurred for capillary roots (1620 ± 24.6 mg kg−1) in 5 mM HOx, when the soil Pb concentration was 800 mg kg−1. The obtained high phytoextraction and phytostabilization potentials were 1208 (±25.6) and 11.75 (±0.32) g Pb ha−1 yr−1 in 10 mmol EDTA kg−1 soil and no chelate treatments, respectively. It may be concluded that chelate application increases Pb uptake by carrots. Consequently, this plant can be introduced as a hyperaccumulator to phytoextract and phytostabilize Pb from contaminated soils.

Original languageEnglish (US)
Pages (from-to)339-358
Number of pages20
JournalArchives of Agronomy and Soil Science
Issue number3
StatePublished - Mar 3 2016
Externally publishedYes


  • ethylenediamine tetraacetate (EDTA)
  • nitrilotriacetic acid (NTA)
  • oxalic acid (HOx)
  • phytoextraction potential
  • phytostabilization potential
  • soil contamination

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Soil Science


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