Hyperaccumulators of metal and metalloid trace elements: Facts and fiction
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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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Journal ArticleDOI
Potential preadaptation to anthropogenic pollution: evidence from a common quantitative trait locus for zinc and cadmium tolerance in metallicolous and nonmetallicolous accessions of Arabidopsis halleri
Claire-Lise Meyer,Maxime Pauwels,Loïc Briset,Cécile Godé,Pietro Salis,Angélique Bourceaux,Dima Souleman,Hélène Frérot,Nathalie Verbruggen +8 more
TL;DR: The results support the role of HMA4 in tolerance capacities of A.halleri that may have pre-existed in nonmetallicolous populations before colonization of metal-polluted habitats and readaptation to metal-contaminated sites is discussed.
Journal ArticleDOI
Herbarium X-ray fluorescence screening for nickel, cobalt and manganese hyperaccumulator plants in the flora of Sabah (Malaysia, Borneo Island)
Antony van der Ent,Antony van der Ent,Ana Ocenar,Romane Tisserand,John B. Sugau,Guillaume Echevarria,Guillaume Echevarria,Peter D. Erskine +7 more
TL;DR: The outcomes of this research demonstrate that X-ray Fluorescence scanning is highly useful approach forhyperaccumulator plant discovery in herbarium collections that has the potential to add vast numbers of hyperaccumulating taxa to the global inventory.
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Metal tolerance in plants: Molecular and physicochemical interface determines the “not so heavy effect” of heavy metals
TL;DR: In this paper , the interactive overlaps between different adaptation and tolerance strategies that may be causally related to their cellular localization, conjugation and homeostasis, a relative affinity for the transporters, rhizosphere modifications, activation of efflux pumps and vacuolar sequestration that singly or collectively determine a plant's response to HM stress.
Journal ArticleDOI
Leaf-age and soil-plant relationships: key factors for reporting trace-elements hyperaccumulation by plants and design applications
Guillaume Losfeld,Laurent L'Huillier,Bruno Fogliani,Stéphane Mc Coy,Claude Grison,Tanguy Jaffré +5 more
TL;DR: Results show that leaf-age should be considered in the design of sample collection and allowed the reclassification of Grevillea meisneri known previously as a Mn accumulator to a Mn hyperaccumulator.
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Contrasting nickel and zinc hyperaccumulation in subspecies of Dichapetalum gelonioides from Southeast Asia.
Philip Nti Nkrumah,Guillaume Echevarria,Peter D. Erskine,Antony van der Ent,Antony van der Ent +4 more
TL;DR: The present study discovered that Dichapetalum gelonioides is the only (zinc) hyperaccumulator known to occur exclusively on ‘normal’ soils, whilehyperaccumulating zinc, and reports exceptionally high foliar nickel and zinc accumulation behaviour in this tropical woody plant.
References
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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
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Phytoremediation of toxic metals : using plants to clean up the environment
Ilya Raskin,Burt D. Ensley +1 more
TL;DR: Why Use Phytoremediation?