A plant genetically modified that accumulates Pb is especially promising for phytoremediation

Gisbert, Carmina; Ros, Roc; Haro, Antonio De; Walker, David J.; Bernal, M.P.; Serrano, Ramón; Navarro-Aviñó, Juan

doi:10.1016/s0006-291x(03)00349-8

Cited by 338 publications

(157 citation statements)

References 21 publications

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“…For instance, Pb, one of the most persistent metals, has a soil retention time of 150-5,000 years. Average biological half-life of Pb has been estimated to be 18, and 10 years once in the human body (Gisbert et al 2003). Some non-essential elements (e.g., As, F, Cd, Hg and Pb) are extremely toxic to biota even at very low concentrations (MoEF 2011;Wang et al 1997).…”

Section: Heavy Metals Toxicity On Biological Systemsmentioning

confidence: 99%

Biotechnological advances in bioremediation of heavy metals contaminated ecosystems: an overview with special reference to phytoremediation

Mani

Kumar

2013

Int. J. Environ. Sci. Technol.

500

137

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The ability of heavy metals bioaccumulation to cause toxicity in biological systems-human, animals, microorganisms and plants-is an important issue for environmental health and safety. Recent biotechnological approaches for bioremediation include biomineralization (mineral synthesis by living organisms or biomaterials), biosorption (dead microbial and renewable agricultural biomass), phytostabilization (immobilization in plant roots), hyperaccumulation (exceptional metal concentration in plant shoots), dendroremediation (growing trees in polluted soils), biostimulation (stimulating living microbial population), rhizoremediation (plant and microbe), mycoremediation (stimulating living fungi/mycelial ultrafiltration), cyanoremediation (stimulating algal mass for remediation) and genoremediation (stimulating gene for remediation process). The adequate restoration of the environment requires cooperation, integration and assimilation of such biotechnological advances along with traditional and ethical wisdom to unravel the mystery of nature in the emerging field of bioremediation. This review highlights better understanding of the problems associated with the toxicity of heavy metals to the contaminated ecosystems and their viable, sustainable and eco-friendly bioremediation technologies, especially the mechanisms of phytoremediation of heavy metals along with some case studies in India and abroad. However, the challenges (biosafety assessment and genetic pollution) involved in adopting the new initiatives for cleaning-up the heavy metals-contaminated ecosystems from both ecological and greener point of view must not be ignored.

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Section: Heavy Metals Toxicity On Biological Systemsmentioning

confidence: 99%

Biotechnological advances in bioremediation of heavy metals contaminated ecosystems: an overview with special reference to phytoremediation

Mani

Kumar

2013

Int. J. Environ. Sci. Technol.

500

137

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“…Furthermore, technique of genetic engineering in microbes is easier and more mature than in plant cells. Therefore, using transgenic technology to create an optimum plant + soil + microbes combination would be a promising way in the future development [42][43][44][45][46][47][48][49][50].…”

Section: Perspectivementioning

confidence: 99%

A critical review on the bio-removal of hazardous heavy metals from contaminated soils: Issues, progress, eco-environmental concerns and opportunities

Kang

Zhang

et al. 2010

Journal of Hazardous Materials

547

182

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a b s t r a c tMechanism of four methods for removing hazardous heavy metal are detailed and comparedchemical/physical remediation, animal remediation, phytoremediation and microremediation with emphasis on bio-removal aspects. The latter two, namely the use of plants and microbes, are preferred because of their cost-effectiveness, environmental friendliness and fewer side effects. Also the obvious disadvantages of other alternatives are listed. In the future the application of genetic engineering or cell engineering to create an expected and ideal species would become popular and necessary. However, a concomitant and latent danger of genetic pollution is realized by a few persons. To cope with this potential harm, several suggestions are put forward including choosing self-pollinated plants, creating infertile polyploid species and carefully selecting easy-controlled microbe species. Bravely, the authors point out that current investigation of noncrop hyperaccumulators is of little significance in application. Pragmatic development in the future should be crop hyperaccumulators (newly termed as "cropaccumulators") by transgenic or symbiotic approach. Considering no effective plan has been put forward by others about concrete steps of applying a hyperaccumulator to practice, the authors bring forward a set of universal procedures, which is novel, tentative and adaptive to evaluate hyperaccumulators' feasibility before large-scale commercialization.

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“…Even though there is a variety of different metal tolerance mechanisms, and there are many reports of transgenic plants with increased metal tolerance and accumulation, most, if not all, transgenic plants created to date rely on overexpressing genes involved in the biosynthesis pathways of metal-binding proteins and peptides (Zhu et al, 1999b;Mejäre & Bülow, 2001;Bennett et al, 2003;Gisbert et al, 2003), genes that can convert a toxic ion into a less toxic or easier to handle form, or a combination of both (Dhankher et al, 2002;Yang et al, 2005b;Mello-Farias & Chaves, 2008). At least three different engineering approaches to enhanced metal uptake can be envisioned (Clemens et al, 2002), which include enhancing the number of uptake sites, alteration of specificity of uptake system to reduce competition by unwanted cations and increasing intracellular binding sites.…”

Section: Genetically Engineered Plants For Phytoremediationmentioning

confidence: 99%

Transgenic Plants for Enhanced Phytoremediation – Physiological Studies

Mello-Farias¹,

Chaves²,

Lencina³

2011

Genetic Transformation

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A plant genetically modified that accumulates Pb is especially promising for phytoremediation

Cited by 338 publications

References 21 publications

Biotechnological advances in bioremediation of heavy metals contaminated ecosystems: an overview with special reference to phytoremediation

Biotechnological advances in bioremediation of heavy metals contaminated ecosystems: an overview with special reference to phytoremediation

A critical review on the bio-removal of hazardous heavy metals from contaminated soils: Issues, progress, eco-environmental concerns and opportunities

Transgenic Plants for Enhanced Phytoremediation – Physiological Studies

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