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Fixation of metals in soil constituents and potential remobilization by hyperaccumulating and non-hyperaccumulating plants: results from an isotopic dilution study.
Environ Pollut. 2006 Oct; 143(3):407-15.EP

Abstract

In this study isotopic dilution methods were used to investigate the hypothesis that access to metals associated with specific chemical components in the soil that are not available to non-accumulator species could be involved in hyperaccumulation. The hyperaccumulator Thlaspi caerulescens and a non-accumulator species, Brassica napus, were grown in Cd and Zn enriched soil components calcite, goethite, charcoal and cryptomelane. The metal enriched components were aged to allow transformation of a proportion of added metals to non-labile forms. Results from the isotopic dilution L value method showed that despite taking up more metals, T. caerulescens accessed the same pool of metals as B. napus. Hence differential access to different solid-phase pools of metals appears to be an unlikely mechanism underlying metal hyperaccumulation. For all components except charcoal, L values for Cd and Zn were greater than the corresponding E values suggesting that E values may tend to underestimate the bioavailable fraction of metals in soils.

Authors+Show Affiliations

Hammer D
Swiss Federal Institute of Technology, ENAC-ISTE-Laboratory of Soil Science, GR B1 423, Station no. 2, Ecublens, 1015 Lausanne, Switzerland.
Keller C
No affiliation info available
McLaughlin MJ
No affiliation info available
Hamon RE
No affiliation info available

MeSH

Biological AvailabilityBrassica napusCadmiumHumansMetals, HeavyPlant RootsSoil PollutantsThlaspiTissue DistributionWaste ManagementZinc

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16457917

Citation

Hammer, Daniel, et al. "Fixation of Metals in Soil Constituents and Potential Remobilization By Hyperaccumulating and Non-hyperaccumulating Plants: Results From an Isotopic Dilution Study." Environmental Pollution (Barking, Essex : 1987), vol. 143, no. 3, 2006, pp. 407-15.
Hammer D, Keller C, McLaughlin MJ, et al. Fixation of metals in soil constituents and potential remobilization by hyperaccumulating and non-hyperaccumulating plants: results from an isotopic dilution study. Environ Pollut. 2006;143(3):407-15.
Hammer, D., Keller, C., McLaughlin, M. J., & Hamon, R. E. (2006). Fixation of metals in soil constituents and potential remobilization by hyperaccumulating and non-hyperaccumulating plants: results from an isotopic dilution study. Environmental Pollution (Barking, Essex : 1987), 143(3), 407-15.
Hammer D, et al. Fixation of Metals in Soil Constituents and Potential Remobilization By Hyperaccumulating and Non-hyperaccumulating Plants: Results From an Isotopic Dilution Study. Environ Pollut. 2006;143(3):407-15. PubMed PMID: 16457917.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fixation of metals in soil constituents and potential remobilization by hyperaccumulating and non-hyperaccumulating plants: results from an isotopic dilution study. AU - Hammer,Daniel, AU - Keller,Catherine, AU - McLaughlin,Michael J, AU - Hamon,Rebecca E, Y1 - 2006/02/07/ PY - 2005/08/09/received PY - 2005/12/05/revised PY - 2005/12/08/accepted PY - 2006/2/7/pubmed PY - 2007/4/14/medline PY - 2006/2/7/entrez SP - 407 EP - 15 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 143 IS - 3 N2 - In this study isotopic dilution methods were used to investigate the hypothesis that access to metals associated with specific chemical components in the soil that are not available to non-accumulator species could be involved in hyperaccumulation. The hyperaccumulator Thlaspi caerulescens and a non-accumulator species, Brassica napus, were grown in Cd and Zn enriched soil components calcite, goethite, charcoal and cryptomelane. The metal enriched components were aged to allow transformation of a proportion of added metals to non-labile forms. Results from the isotopic dilution L value method showed that despite taking up more metals, T. caerulescens accessed the same pool of metals as B. napus. Hence differential access to different solid-phase pools of metals appears to be an unlikely mechanism underlying metal hyperaccumulation. For all components except charcoal, L values for Cd and Zn were greater than the corresponding E values suggesting that E values may tend to underestimate the bioavailable fraction of metals in soils. SN - 0269-7491 UR - https://www.unboundmedicine.com/medline/citation/16457917/Fixation_of_metals_in_soil_constituents_and_potential_remobilization_by_hyperaccumulating_and_non_hyperaccumulating_plants:_results_from_an_isotopic_dilution_study_ DB - PRIME DP - Unbound Medicine ER -