Journal ArticleDOI
Metal hyperaccumulation and bioremediation
Kavita Shah,J. M. Nongkynrih +1 more
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TLDR
An assessment of the current status of technology development and its future prospects with emphasis on a combinatorial approach is concluded.Abstract:
The phytoremediation is an environment friendly, green technology that is cost effective and energetically inexpensive. Metal hyperaccumulator plants are used to remove metal from terrestrial as well as aquatic ecosystems. The technique makes use of the intrinsic capacity of plants to accumulate metal and transport them to shoots, ability to form phytochelatins in roots and sequester the metal ions. Harbouring the genes that are considered as signatures for the tolerance and hyperaccumulation from identified hyperaccumulator plant species into the transgenic plants provide a platform to develop the technology with the help of genetic engineering. This would result in transgenics that may have large biomass and fast growth a quality essential for removal of metal from soil quickly and in large quantities. Despite so much of a potential, the progress in the field of developing transgenic phytoremediator plant species is rather slow. This can be attributed to the lack of our understanding of complex interactions in the soil and indigenous mechanisms in the plants that allow metal translocation, accumulation and removal from a site. The review focuses on the work carried out in the field of metal phytoremediation from contaminated soil. The paper concludes with an assessment of the current status of technology development and its future prospects with emphasis on a combinatorial approach.read more
Citations
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Phytoremediation of heavy metals—Concepts and applications
TL;DR: This review article comprehensively discusses the background, concepts and future trends in phytoremediation of heavy metals.
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Approaches for enhanced phytoextraction of heavy metals.
TL;DR: The present review aims to give an updated version of information available with respect to metal tolerance and accumulation mechanisms in plants, as well as on the environmental and genetic factors affecting heavy metal uptake.
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Biotechnological strategies applied to the decontamination of soils polluted with heavy metals.
TL;DR: In this present review some remediation techniques to remediate soils are presented, focusing on the use of plants that are capable of surviving in soils with heavy metals along with the function of some microorganisms in the restoration process.
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.
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PHYTOCHELATINS AND METALLOTHIONEINS: Roles in Heavy Metal Detoxification and Homeostasis
TL;DR: Recent advances in understanding the regulation of PC biosynthesis and MT gene expression and the possible roles of PCs and MTs in heavy metal detoxification and homeostasis are reviewed.
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A fern that hyperaccumulates arsenic
TL;DR: A hardy, versatile, fast-growing plant that helps to remove arsenic from contaminated soils.
Journal ArticleDOI
Effects of metals on enzyme activity in plants
F. Van Assche,Herman Clijsters +1 more
TL;DR: The induction of enzymes and metal-specific changes in isoperoxidase pattern can be used as diagnostic criteria to evaluate the phytotoxicity of soils, contaminated by several metals.
Journal ArticleDOI
Molecular mechanisms of plant metal tolerance and homeostasis.
TL;DR: Recent progress in the molecular understanding of plant metal homeostasis and tolerance is reviewed and a number of uptake transporters have been cloned as well as candidates for the vacuolar sequestration of metals are identified.