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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Description/Abstract

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.

Item Type: Article
ISSNs: 0022-0957 (print)
Related URLs:
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
ePrint ID: 55725
Date Deposited: 05 Aug 2008
Last Modified: 27 Mar 2014 18:38
Contact Email Address: jh3@soton.ac.uk
URI: http://eprints.soton.ac.uk/id/eprint/55725

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