Hyperaccumulators of metal and metalloid trace elements: Facts and fiction
Reads0
Chats0
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
Citations
More filters
Journal ArticleDOI
Natural community of macroalgae from chromium-contaminated site for effective remediation of Cr(VI)-containing leachates.
TL;DR: In this article, a taxonomic analysis revealed mixed composition of the filamentous forms of algae and showed that three species of Tribonema, namely T. vulgare, T. microchloron and T. viride, are likely responsible for the effective bioremediation of this highly Cr(VI)-polluted habitat.
Journal ArticleDOI
Metal accumulation and rhizosphere characteristics of Noccaea rotundifolia ssp. cepaeifolia
Alireza Golestanifard,Alireza Golestanifard,Markus Puschenreiter,Amal Aryan,Jakob Santner,Walter W. Wenzel +5 more
TL;DR: Metal accumulation rates and translocation factors do not meet the criteria for hyperaccumulation, and specific rhizosphere mechanisms targeting the alleviation of metal toxicity in N. rotundifolia were apparently not involved in targeted immobilisation or detoxification of Pb, Zn and Cd.
Journal ArticleDOI
The potential of elm trees (Ulmus glabra Huds.) for the phytostabilisation of potentially toxic elements in the riparian zone of the Sava River
Zorana Mataruga,Snežana Jarić,Olga Kostić,Milica Marković,Ksenija Jakovljević,Miroslava Mitrović,Pavle Pavlović +6 more
TL;DR: Research into a successful phytoremediating species provides new possibilities when selecting PTE-tolerant native trees in riparian zones of large regional rivers such as the Sava, and indicates that PTE levels in soil strongly influence those in plants.
Journal ArticleDOI
Tolerance to cadmium of Agave lechuguilla (Agavaceae) seeds and seedlings from sites contaminated with heavy metals.
TL;DR: The hypothesis that plants from metal-contaminated places do not tolerate more pollution, because of the accumulative effect that cadmium might have on them, fitted into the hypothesis that seeds of Agave lechuguilla from contaminated sites with heavy metals were more tolerant to Cd ions than seeds from noncontamination sites.
Journal ArticleDOI
Treatment wetlands and phyto-technologies for remediation of winery effluent: Challenges and opportunities.
TL;DR: In this article, a review of the status quo and challenges associated with the characteristics of winery wastewater, and the functional components, operational parameters, and performance of treatment wetlands for remediation of wine effluent is presented.
References
More filters
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
TL;DR: In this paper, two basic strategies of plant response are suggested, accumulators and excluders, which do not generally suppress metal uptake but result in internal detoxification, and indicators are seen as a further mode of response where proportional relationships exist between metal levels in the soil, uptake and accumulation in plant parts.
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
Zinc in plants
Martin R. Broadley,Philip J. White,John P. Hammond,Ivan Zelko,Ivan Zelko,Alexander Lux,Alexander Lux +6 more
TL;DR: The dominant fluxes of Zn in the soil-root-shoot continuum are described, including Zn inputs to soils, the plant availability of soluble Zn(2+) at the root surface, and plant uptake and accumulation of ZN.
Book
Phytoremediation of toxic metals : using plants to clean up the environment
Ilya Raskin,Burt D. Ensley +1 more
TL;DR: Why Use Phytoremediation?