Hyperaccumulators of metal and metalloid trace elements: Facts and fiction
Abstract:
Plants that accumulate metal and metalloid trace elements to extraordinarily high concentrations in their living biomass have inspired much research worldwide during the last decades. Hyperaccumulators have been recorded and experimentally confirmed for elements such as nickel, zinc, cadmium, manganese, arsenic and selenium. However, to date, hyperaccumulation of lead, copper, cobalt, chromium and thallium remain largely unconfirmed. Recent uses of the term in relation to rare-earth elements require critical evaluation. Since the mid-1970s the term ‘hyperaccumulator’ has been used millions of times by thousands of people, with varying degrees of precision, aptness and understanding that have not always corresponded with the views of the originators of the terminology and of the present authors. There is therefore a need to clarify the circumstances in which the term ‘hyperaccumulator’ is appropriate and to set out the conditions that should be met when the terms are used. We outline here the main considerations for establishing metal or metalloid hyperaccumulation status of plants, (re)define some of the terminology and note potential pitfalls. Unambiguous communication will require the international scientific community to adopt standard terminology and methods for confirming the reliability of analytical data in relation to metal and metalloid hyperaccumulators.read more
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Book ChapterDOI
The ecophysiology, genetics, adaptive significance, and biotechnology of nickel hyperaccumulation in plants
TL;DR: This chapter focuses on nickel hyperaccumulation, the best understood example of this phenomenon in the plant kingdom, which has already been applied to practical uses in large-scale bioremediation efforts and in eco-friendly mining practices.
Journal ArticleDOI
A new assay of bacterial selection with Pb reveals an unexpected effect of Pb on bacterial behavior: implications for remediation
Dorine Bouquet,Alexandra Lepinay,Pierre Gaudin,Liliane Jean-Soro,Cécile Le Guern,Eric Lichtfouse,Thierry Lebeau +6 more
TL;DR: A microplate assay with Pb-enriched growth media for the rapid selection of bacterial strains allows to reveal new bacterial properties, which would not have been disclosed by current methods that do not take into account the effect of metals.
Journal ArticleDOI
The potential of Blepharidium guatemalense for nickel agromining in Mexico and Central America.
Dulce Montserrat Navarrete Gutiérrez,Dulce Montserrat Navarrete Gutiérrez,Philip Nti Nkrumah,Antony van der Ent,Antony van der Ent,Joseph Pollard,Alan J. M. Baker,Alan J. M. Baker,Alan J. M. Baker,Francisco Navarrete Torralba,Marie-Noëlle Pons,Jesús Axayacatl Cuevas Sánchez,Teodoro Gómez Hernández,Guillaume Echevarria,Guillaume Echevarria +14 more
TL;DR: In this paper, the authors assess the potential of the woody nickel hyperaccumulator Blepharidium guatemalense (Standl) Standl for agromining in southeastern Mexico.
Journal ArticleDOI
Identification of chelidonic acid as the predominant ligand involved in ni uptake in the hyperaccumulator berkheya coddii
TL;DR: In this article, a combination of chromatography and spectroscopy led to the identification of chelidonic acid as the ligand playing a significant role in Ni uptake in B. coddii.
Journal ArticleDOI
Responses of the species complex Fallopia × bohemica to single-metal contaminations to Cd, Cr or Zn: growth traits, metal accumulation and secondary metabolism
Louise Barberis,Wilfried Chevalier,Marie-Laure Toussaint,Philippe Binet,Florence Piola,Serge Michalet +5 more
TL;DR: The results compared to multi-contamination experiments previously published suggest complex interactions between metals and plant, depending principally on metal identity and also suggest a potential role of soil microbes in the interactions.
References
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Terrestrial higher plants which hyperaccumulate metallic elements. a review of their distribution, ecology and phytochemistry
TL;DR: Phytochemical studies suggest that hyperaccumulation is closely linked to the mechanism of metal tolerance involved in the successful colonization of metalliferous and otherwise phytotoxic soils.
Journal ArticleDOI
Accumulators and excluders ?strategies in the response of plants to heavy metals
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Journal ArticleDOI
A fern that hyperaccumulates arsenic
TL;DR: A hardy, versatile, fast-growing plant that helps to remove arsenic from contaminated soils.
Journal ArticleDOI
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Martin R. Broadley,Philip J. White,John P. Hammond,Ivan Zelko,Ivan Zelko,Alexander Lux,Alexander Lux +6 more
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TL;DR: Why Use Phytoremediation?