Cellular mechanisms for heavy metal detoxification and tolerance
Hall, J.L. (2002) Cellular mechanisms for heavy metal detoxification and tolerance. Journal of Experimental Botany, 53, (366), 1-11.
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Heavy metals such as Cu and Zn are essential for normal plant growth, although elevated concentrations of both essential and non-essential metals can result in growth inhibition and toxicity symptoms. Plants possess a range of potential cellular mechanisms that may be involved in the detoxification of heavy metals and thus tolerance to metal stress. These include roles for the following: for mycorrhiza and for binding to cell wall and extracellular exudates; for reduced uptake or efflux pumping of metals at the plasma membrane; for chelation of metals in the cytosol by peptides such as phytochelatins; for the repair of stress-damaged proteins; and for the compartmentation of metals in the vacuole by tonoplast-located transporters. This review provides a broad overview of the evidence for an involvement of each mechanism in heavy metal detoxification and tolerance.
|Keywords:||detoxification, heat shock proteins, heavy metal tolerance, metallothioneins, mycorrhiza, phytochelatins, plasma membrane, vacuolar compartmentation|
|Subjects:||S Agriculture > SB Plant culture
Q Science > QH Natural history > QH301 Biology
|Divisions:||University Structure - Pre August 2011 > School of Biological Sciences
|Date Deposited:||05 Aug 2008|
|Last Modified:||27 Mar 2014 18:38|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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