TY - JOUR
T1 - Arabidopsis thaliana seedlings show an age-dependent response on growth and DNA repair after exposure to chronic gamma-radiation
AU - Biermans, Geert
AU - Horemans, Nele
AU - Vanhoudt, Nathalie
AU - Vandenhove, Hildegarde
AU - Saenen, Eline
AU - Van Hees, May
AU - Wannijn, Jean
AU - Vangronsveld, Jaco
AU - Cuypers, Ann
A2 - Vanmarcke, Hans
N1 - Score = 10
PY - 2015/1
Y1 - 2015/1
N2 - The biosphere is constantly exposed to ionising radiation, due to cosmic radiation and the presenceof natural and anthropogenic radionuclides in the environment. The biological effects of the resultingradiation exposure are currently poorly understood in plants, due to a large influence of parameters suchas 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−1chronic _-radiation ina hydroponic setup. The response of growth, photosynthesis and the transcription of genes involved inDNA repair, cell cycle and signalling were measured. The results show that there is a difference in growthresponse 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.
AB - The biosphere is constantly exposed to ionising radiation, due to cosmic radiation and the presenceof natural and anthropogenic radionuclides in the environment. The biological effects of the resultingradiation exposure are currently poorly understood in plants, due to a large influence of parameters suchas 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−1chronic _-radiation ina hydroponic setup. The response of growth, photosynthesis and the transcription of genes involved inDNA repair, cell cycle and signalling were measured. The results show that there is a difference in growthresponse 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.
KW - Ionising radiation
KW - Arabidopsis thaliana
KW - Abiotic stress
KW - Biological effects
KW - Gene expression
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_137796
UR - http://knowledgecentre.sckcen.be/so2/bibref/12077
U2 - 10.1016/j.envexpbot.2014.09.001
DO - 10.1016/j.envexpbot.2014.09.001
M3 - Article
SN - 0098-8472
VL - 109
SP - 122
EP - 130
JO - Environmental and Experimental Botany
JF - Environmental and Experimental Botany
IS - 01
ER -