Heavy Metal Detoxication in Plants: Phytochelatin Biosynthesis and Function
نویسنده
چکیده
WORTH A SECOND LOOK Our search for reviews for IUBMB Life includes essays appearing in media of more limited circulation that merit exposure to an international readership. One source of excellent reviews is the Australian Biochemist, the newsletter for the Australian Society for Biochemistry and Molecular Biology, Inc. A review on heavymetal detoxi cation in plants was published there inDecember 2000 (vol. 31, pp. 16–19).The author, Christopher Cobbett, Kindly agreed to provide the version republished here. We thank him and the Society, particularly the Newsletter Editor, Philip Nageley, for their cooperation, which will include granting permission to reprint, where material from the original is reproduced in its original form.
منابع مشابه
Heavy Metal Detoxification in Plants: Phytochelatin Biosynthesis and Function
Plants have evolved an extensive suite of adaptive responses to heavy metal toxicity. These include the immobilisation, exclusion, chelation and compartmentalisation of metal ions and often involve metal-binding ligands. A number of such ligands have been identified in plants and include organic acids, amino acids, peptides and polypeptides. Polypeptides include the metallothioneins (MTs), smal...
متن کاملPhytochelatin biosynthesis and function in heavy-metal detoxification.
Plants respond to heavy-metal toxicity via a number of mechanisms. One such mechanism involves the chelation of heavy metals by a family of peptide ligands, the phytochelatins. Molecular genetic approaches have resulted in important advances in our understanding of phytochelatin biosynthesis. In particular, genes encoding the enzyme phytochelatin synthase have been isolated from plant and yeast...
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An important pathway by which plants detoxify heavy metals is through sequestration with heavy-metal-binding peptides called phytochelatins or their precursor, glutathione. To identify limiting factors for heavy-metal accumulation and tolerance, and to develop transgenic plants with an increased capacity to accumulate and/or tolerate heavy metals, the Escherichia coli gshII gene encoding glutat...
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Increasing emissions of heavy metals such as cadmium, mercury, and arsenic into the environment pose an acute problem for all organisms. Considerations of the biochemical basis of heavy metal detoxification in animals have focused exclusively on two classes of peptides, the thiol tripeptide, glutathione (GSH, gamma-Glu-Cys-Gly), and a diverse family of cysteine-rich low molecular weight protein...
متن کاملTonoplast-localized Abc2 transporter mediates phytochelatin accumulation in vacuoles and confers cadmium tolerance.
Phytochelatins mediate tolerance to heavy metals in plants and some fungi by sequestering phytochelatin-metal complexes into vacuoles. To date, only Schizosaccharomyces pombe Hmt1 has been described as a phytochelatin transporter and attempts to identify orthologous phytochelatin transporters in plants and other organisms have failed. Furthermore, recent data indicate that the hmt1 mutant accum...
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تاریخ انتشار 2002