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01.Phytoremediation of Heavy Metals using Poplars (Populus spp): A Glimpse of the Plant Responses to Copper, Cadmium and Zinc Stress pp. 387-414
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Phytoremediation of Cd, Pb and Cr by Woody Plants pp. 529-550 $100.00
Authors:  (Alex-Alan F. de Almeida, Marcelo S. Mielke, Fábio P. Gomes, Luana Mahé C. Gomes, Pedro A. O. Mangabeira, Raúl R. Valle, Departamento de Ciencias Biologicas, Universidade Estadual de Santa Cruz, Ilheus, B.A., Brazil)
Abstract:
High concentrations of metallic elements as Cd, Pb and Cr can cause harmful effects to the environment. These highly toxic pollutants constitute a risk for the aquatic and terrestrial life, especially plants, animals and humans. They are associated to diverse bioavailable geochemical fractions, such as the water-soluble fraction and the exchangeable fraction, and to non-available fractions such as those associated with the crystalline net of clays and silica minerals.
Depending upon its chemical and physical properties different mechanisms of metals toxicity in plants can be distinguish, such as production of reactive oxygen species from the auto-oxidation, blocking and/or displacement of essential functional groups or metallic ions of biomolecules, changes in the permeability of cellular membranes, reactions of sulphydryl groups with cations, affinity for reactions with phosphate groups and active groups of ADP or ATP, substitution of essential ions, induction of chromosomal anomalies and decrease of the cellular division rate. 


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Phytoremediation of Cd, Pb and Cr by Woody Plants pp. 529-550