Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/13118
Title: Phytoextraction of toxic metals: a central role for glutathione
Authors: Seth, C.S.
REMANS, Tony 
KEUNEN, Els 
JOZEFCZAK, Marijke 
GIELEN, Heidi 
OPDENAKKER, Kelly 
WEYENS, Nele 
VANGRONSVELD, Jaco 
CUYPERS, Ann 
Issue Date: 2012
Source: PLANT CELL AND ENVIRONMENT, 35(2), p. 334-346
Abstract: Phytoextraction has a promising potential as an environmentally friendly clean-up method for soils contaminated with toxic metals. To improve the development of efficient phytoextraction strategies, better knowledge regarding metal uptake, translocation and detoxification in planta is a prerequisite. This review highlights our current understanding on these mechanisms, and their impact on plant growth and health. Special attention is paid to the central role of glutathione (GSH) in this process. Because of the high affinity of metals to thiols and as a precursor for phytochelatins (PCs), GSH is an essential metal chelator. Being an important antioxidant, a direct link between metal detoxification and the oxidative challenge in plants growing on contaminated soils is observed, where GSH could be a key player. In addition, as redox couple, oxidized and reduced GSH transmits specific information, in this way tuning cellular signalling pathways under environmental stress conditions. Possible improvements of phytoextraction could be achieved by using transgenic plants or plant-associated microorganisms. Joined efforts should be made to cope with the challenges faced with phytoextraction in order to successfully implement this technique in the field.
Notes: Reprint Address: Cuypers, A (reprint author), Hasselt Univ, Ctr Environm Sci, Agoralaan Bldg, B-3590 Diepenbeek, Belgium - Addresses: 1. Hasselt Univ, Ctr Environm Sci, B-3590 Diepenbeek, Belgium - 2. Inst Himalayan Bioresource Technol, Biotechnol Div, Council Sci & Ind Res, Palampur 176061, Himachal Prades, India - E-mail Address: seth_bhu@yahoo.co.in, ann.cuypers@uhasselt.be
Keywords: accumulation; antioxidant; chelation; metal homeostasis; metal pollution; signalling; transgenics; transporter
Document URI: http://hdl.handle.net/1942/13118
ISSN: 0140-7791
e-ISSN: 1365-3040
DOI: 10.1111/j.1365-3040.2011.02338.x
ISI #: 000298795600012
Category: A1
Type: Journal Contribution
Validations: ecoom 2013
Appears in Collections:Research publications

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