About: Hyperaccumulator is a research topic. Over the lifetime, 2519 publications have been published within this topic receiving 119958 citations.
Papers published on a yearly basis
01 Jan 1989
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.
Abstract: This paper reviews the plant geography, ecology, metal tolerance and phytochcmistry of terrestrial higher plants which arc able to accumulate metallic elements in their dry matter to an exceptional degree. The review is limited to the elements Co, Cu, Cr, Pb. Mn. Ni and Zn. Hyperaccumulators of Co, Cu, Cr, Pb and Ni arc here defined as plants containing over 1000 u.g/g (ppm) of any of these elements in the dry matter; for Mn and Zn, the criterion is 10,000 u.g/g (1%). A unifying feature of hypcraccumula ting plants is their general restriction to mineralized soils and specific rock types. Lists of hypcraccumula ting species arc presented for the elements considered. These suggest that the phenomenon is widespread throughout the plant kingdom. For example, 145 hyper-accumulators of nickel are reported: these arc distributed among 6 supcrordcrs, 17 orders, and 22 families and include herbs, shrubs and trees from both the temperate and tropical zones. Although some phylogcnetic relationships emerge, the evolutionary significance of metal hyperaccumulation remains obscure. Phytochemical studies however suggest that hyperaccumulation is closely linked to the mechanism of metal tolerance involved in the successful colonization of metalliferous and otherwise phytotoxic soils. The potentialities of hyperaccumula ting plants in biorccovcry and soil detoxification arc indicated.
TL;DR: An overview of literature discussing the phytoremediation capacity of hyperaccumulators to clean up soils contaminated with heavy metals and the possibility of using these plants in phytomining is presented.
TL;DR: It is shown that native plant species growing on contaminated sites may have the potential for phytoremediation.
TL;DR: Four research areas relevant to metal phytoextraction from contaminated soil are reviewed and an assessment of the current status of technology deployment and suggestions for future phytoremediation research are concluded.
Abstract: plants capable of accumulating uncommonly high Zn levels. In 1935, Byers documented the accumulation of Remediation of sites contaminated with toxic metals is particularly selenium in Astragalus spp. One decade later, Minguzzi challenging. Unlike organic compounds, metals cannot be degraded, and the cleanup usually requires their removal. However, this energy- and Vergnano (1948) identified plants capable of hyperintensive approach can be prohibitively expensive. In addition, the accumulating up to 1% Ni in shoots. Following the idenmetal removing process often employs stringent physicochemical tification of these and other hyperaccumulator species, agents which can dramatically inhibit soil fertility with subsequent a great deal of research has been conducted to elucidate negative impacts on the ecosystem. Phytoremediation has been pro- the physiology and biochemistry of metal hyperaccumuposed as a cost-effective, environmental-friendly alternative technol- lation in plants. Significant results have been obtained, ogy. A great deal of research indicates that plants have the genetic and the understanding of metal accumulating mechapotential to remove many toxic metals from the soil. Despite this nisms substantially advanced. However, a better undpotential, phytoremediation is yet to become a commercially available erstanding of the biological processes is needed if phytechnology. Progress in the field is hindered by a lack of understanding toextraction is to become a reliable, commercially of complex interactions in the rhizosphere and plant-based mechanisms which allow metal translocation and accumulation in plants. In available technology. this paper, four research areas relevant to metal phytoextraction from The success of phytoextraction, as an environmental contaminated soil are reviewed. The review concludes with an assess- cleanup technology, depends on several factors includment of the current status of technology deployment and suggestions ing the extent of soil contamination, metal availability for future phytoremediation research. for uptake into roots (bioavailability), and plant ability to intercept, absorb, and accumulate metals in shoots (Ernst, 1996). Ultimately, the potential for phytoextracP hytoremediation, the use of plants for environmen- tion depends on the interaction between soil, metal, and tal restoration, is an emerging cleanup technology. plant. The complexity of this interaction, controlled by To exploit plant potential to remediate soil and water climatic conditions, argues against generic and in favor contaminated with a variety of compounds, several tech- of a site specific phytoremediating approach. This undernological subsets have been proposed. Phytoextraction lines the importance of understanding the mechanisms is the use of higher plants to remove inorganic contami- and processes that govern metal uptake and accumulanants, primarily metals, from polluted soil. In this ap- tion in plants. In this review, four research areas, releproach, plants capable of accumulating high levels of vant to soil and plant interaction as it relates to metal metals are grown in contaminated soil. At maturity, phytoextraction, have been identified. The significance metal-enriched aboveground biomass is harvested and of these areas is briefly discussed below.
TL;DR: Little molecular understanding of plant activities critical to phytoremediation has been achieved, but recent progress in characterizing Fe, Cd and Zn uptake by Arabidopsis and yeast mutants indicates strategies for developing transgenic improved phytOREmediation cultivars for commercial use.
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