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Title: Arabidopsis thaliana seedlings show an age-dependent response on growth and DNA repair after exposure to chronic gamma-radiation
Authors: Biermans, Geert
Horemans, Nele
Vanhoudt, Nathalie
Vandenhove, Hildegarde
Saenen, Eline
Van Hees, May
Wannijn, Jean
Vangronsveld, Jaco
Cuypers, Ann
Issue Date: 2015
Abstract: The biosphere is constantly exposed to ionising radiation, due to cosmic radiation and the presence of natural and anthropogenic radionuclides in the environment. The biological effects of the resulting radiation exposure are currently poorly understood in plants, due to a large influence of parameters such as species, cultivar, experimental setup and plant age on the response. In this study, 7-, 10- and 14-day-old Arabidopsis thaliana seedlings were exposed to 96 h and 168 h of 100 mGy h(-1) chronic gamma-radiation in a hydroponic setup. The response of growth, photosynthesis and the transcription of genes involved in DNA repair, cell cycle and signalling were measured. The results show that there is a difference in growth response between plants of different ages and decreasing radiosensitivity with increasing seedling age. This is linked to differences in regulation of DNA repair and cell cycle control at the transcriptional level. (C) 2014 Elsevier B.V. All rights reserved.
Notes: [Biermans, Geert; Horemans, Nele; Vanhoudt, Nathalie; Vandenhove, Hildegarde; Saenen, Eline; Van Hees, May; Wannijn, Jean] SCK CEN, Biosphere Impact Studies, B-2400 Mol, Belgium. [Biermans, Geert; Saenen, Eline; Vangronsveld, Jaco; Cuypers, Ann] Univ Hasselt, Environm Res Ctr, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/18088
DOI: 10.1016/j.envexpbot.2014.09.001
ISI #: 000345478000015
ISSN: 0098-8472
Category: A1
Type: Journal Contribution
Validation: ecoom, 2015
Appears in Collections: Research publications

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