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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/10280

Title: Oxidative stress-related responses at transcriptional and enzymatic levels after exposure to Cd or Cu in a multipollution context
Authors: SMEETS, Karen
OPDENAKKER, Kelly
REMANS, Tony
VAN SANDEN, Suzy
VAN BELLEGHEM, Frank
SEMANE, Brahim
Horemans, Nele
Guisez, Yves
VANGRONSVELD, Jaco
CUYPERS, Ann
Issue Date: 2009
Publisher: ELSEVIER GMBH, URBAN & FISCHER VERLAG
Citation: JOURNAL OF PLANT PHYSIOLOGY, 166 (18). p. 1982-1992
Abstract: The physiological effects of Cd and Cu have been highlighted in several studies over the last years. At the cellular level, oxidative stress has been reported as a common mechanism in both stress situations. Nevertheless, because of differences in their redox-related properties, the origin of the stress and regulation of these effects can be very different. Our results show a specific Cd-related induction of NADPH oxidases, whereas both metals induced lipid peroxidation via the activation of lipoxygenases. With respect to the antioxidative defense system, metal-specific patterns of superoxide dismutases (SODs) were detected, whereas gene expression levels of the H2O2-quenching enzymes were equally induced by both metals. Because monometallic exposure is very unusual in real-world situations, the metal-specific effects were compared with the mechanisms induced when the plants are exposed to both metals simultaneously. Combined exposure to Cd and Cu enhanced some of the effects that were induced when only one metal was applied to the medium. Other specific monometallically induced effects, such as a copper zinc superoxide dismutase (CSD2) downregulation due to Cd, were also sustained in a multipollution context, irrespective of the other monometallic effects. Furthermore, specific multipollution effects were unravelled, as iron superoxide dismutase 1 (FSD1) upregulation in the leaves was significant only when both Cu and Cd were applied. Additional relationships between these treatments and the common and specific stress induction mechanisms are discussed. (C) 2009 Elsevier GmbH. All rights reserved.
Notes: [Smeets, Karen; Opdenakker, Kelly; Remans, Tony; Semane, Brahim; Vangronsveld, Jaco; Cuypers, Ann] Hasselt Univ, Ctr Environm Sci, B-3590 Diepenbeek, Belgium. [Van Sanden, Suzy] Hasselt Univ, Ctr Stat, B-3590 Diepenbeek, Belgium. [Van Belleghem, Frank] Open Univ Netherlands, Sch Sci, NL-6401 DL Heerlen, Netherlands. [Horemans, Nele; Guisez, Yves] Univ Antwerp, Dept Biol, B-2020 Antwerp, Belgium. karen.smeets@uhasselt.be
URI: http://hdl.handle.net/1942/10280
DOI: 10.1016/j.jplph.2009.06.014
ISI #: 000272528100003
ISSN: 0176-1617
Category: A1
Type: Journal Contribution
Validation: ecoom, 2010
Appears in Collections: Research publications

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