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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/19897

Title: beta-Radiation Stress Responses on Growth and Antioxidative Defense System in Plants: A Study with Strontium-90 in Lemna minor
Authors: Van Hoeck, Arne
Horemans, Nele
Van Hees, May
Nauts, Robin
Knapen, Dries
Vandenhove, Hildegarde
Blust, Ronny
Issue Date: 2015
Publisher: MDPI AG
Abstract: In the following study, dose dependent effects on growth and oxidative stress induced by -radiation were examined to gain better insights in the mode of action of -radiation induced stress in plant species. Radiostrontium (Sr-90) was used to test for -radiation induced responses in the freshwater macrophyte Lemna minor. The accumulation pattern of Sr-90 was examined for L. minor root and fronds separately over a seven-day time period and was subsequently used in a dynamic dosimetric model to calculate -radiation dose rates. Exposing L. minor plants for seven days to a Sr-90 activity concentration of 25 up to 25,000 kBqL(-1) resulted in a dose rate between 0.084 +/- 0.004 and 97 +/- 8 mGyh(-1). After seven days of exposure, root fresh weight showed a dose dependent decrease starting from a dose rate of 9.4 +/- 0.5 mGyh(-1). Based on these data, an EDR10 value of 1.5 +/- 0.4 mGyh(-1) was estimated for root fresh weight and 52 +/- 17 mGyh(-1) for frond fresh weight. Different antioxidative enzymes and metabolites were further examined to analyze if -radiation induces oxidative stress in L. minor.
Notes: [Van Hoeck, Arne; Horemans, Nele; Van Hees, May; Nauts, Robin; Vandenhove, Hildegarde] CEN SCK, Belgian Nucl Res Ctr, B-2400 Mol, Belgium. [Van Hoeck, Arne; Blust, Ronny] Univ Antwerp, Dept Biol, B-2020 Antwerp, Belgium. [Horemans, Nele] Univ Hasselt, Environm Res Ctr, B-3590 Diepenbeek, Belgium. [Knapen, Dries] Univ Antwerp, Vet Sci, B-2020 Antwerp, Belgium.
URI: http://hdl.handle.net/1942/19897
DOI: 10.3390/ijms160715309
ISI #: 000359900100060
ISSN: 1422-0067
Category: A1
Type: Journal Contribution
Validation: ecoom, 2016
Appears in Collections: Research publications

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