Document Server@UHasselt >
Research >
Research publications >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/11443

Title: Study of oxidative stress related responses induced in Arabidopsis thaliana following mixed exposure to uranium and cadmium
Authors: VANHOUDT, Nathalie
Vandenhove, Hildegarde
Horemans, Nele
Wannijn, Jean
Bujanic, Andelko
Issue Date: 2010
Citation: PLANT PHYSIOLOGY AND BIOCHEMISTRY, 48(10-11). p. 879-886
Abstract: In this study, toxicity effects in plants of uranium in a binary pollution condition were investigated by studying biological responses and unraveling oxidative stress related mechanisms in Arabidopsis thaliana seedlings, grown on hydroponics and exposed for 3 days to 10 mu M uranium in combination with 5 mu M cadmium. While uranium mostly accumulated in the roots with very low root-to-shoot transport, cadmium was taken up less by the roots but showed higher translocation to the shoots. Under mixed exposure, cadmium influenced uranium uptake highly but not the other way round resulting in a doubled uranium concentration in the roots. Under our mixed exposure conditions, it is clear that micronutrient concentrations in the roots are strongly influenced by addition of cadmium as a second stressor, while leaf macronutrient concentrations are mostly influenced by uranium. Oxidative stress related responses are highly affected by cadmium while uranium influence is more limited. Hereby, an important role was attributed to the ascorbate redox balance together with glutathione as both metabolites, but more explicitly for ascorbate, increased their reduced form, indicating an important defense and regulatory function. While for roots, based on an increase in FSD1 gene expression, oxidative stress was suggested to be superoxide induced, in leaves on the other hand, hydrogen peroxide related genes were mostly altered. (C) 2010 Elsevier Masson SAS. All rights reserved.
Notes: [Vanhoudt, Nathalie; Vandenhove, Hildegarde; Horemans, Nele; Wannijn, Jean; Bujanic, Andelko] Belgian Nucl Res Ctr SCK CEN, B-2400 Mol, Belgium. [Vanhoudt, Nathalie; Vangronsveld, Jaco; Cuypers, Ann] Hasselt Univ, Ctr Environm Sci, B-3590 Diepenbeek, Belgium. nvanhoud@sckcen.be
URI: http://hdl.handle.net/1942/11443
DOI: 10.1016/j.plaphy.2010.08.005
ISI #: 000284342800011
ISSN: 0981-9428
Category: A1
Type: Journal Contribution
Validation: ecoom, 2011
Appears in Collections: Research publications

Files in This Item:

Description SizeFormat
published version264.64 kBAdobe PDF

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.