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      Potential of Aquatic Macrophytes for Removing Contaminants from the Environment

      , ,
      Critical Reviews in Environmental Science and Technology
      Informa UK Limited

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          Cellular mechanisms for heavy metal detoxification and tolerance

          J.L. Hall (2002)
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            SELENIUM IN HIGHER PLANTS.

            Plants vary considerably in their physiological response to selenium (Se). Some plant species growing on seleniferous soils are Se tolerant and accumulate very high concentrations of Se (Se accumulators), but most plants are Se nonaccumulators and are Se-sensitive. This review summarizes knowledge of the physiology and biochemistry of both types of plants, particularly with regard to Se uptake and transport, biochemical pathways of assimilation, volatilization and incorporation into proteins, and mechanisms of toxicity and tolerance. Molecular approaches are providing new insights into the role of sulfate transporters and sulfur assimilation enzymes in selenate uptake and metabolism, as well as the question of Se essentiality in plants. Recent advances in our understanding of the plant's ability to metabolize Se into volatile Se forms (phytovolatilization) are discussed, along with the application of phytoremediation for the cleanup of Se contaminated environments.
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              Phytochelatins: the principal heavy-metal complexing peptides of higher plants.

              A set of novel heavy-metal complexing peptides was isolated from plant cell suspension cultures; the structure of the peptides was established as (gamma-glutamic acid-cysteine)n-glycine (n = 3 to 7). These peptides appear upon induction of plant cells with heavy metals and represent the principal metal-binding activities in the cells. The name phytochelatin is proposed for this new class of natural products.
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                Author and article information

                Journal
                Critical Reviews in Environmental Science and Technology
                Critical Reviews in Environmental Science and Technology
                Informa UK Limited
                1064-3389
                1547-6537
                August 31 2009
                August 31 2009
                : 39
                : 9
                : 754-781
                Article
                10.1080/10643380801977776
                bcb02861-ada0-411a-9c67-9e3c95f51e37
                © 2009
                History

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