Characterizing dose response relationships: Chronic gamma radiation in Lemna minor induces oxidative stress and altered polyploidy level

Journal of Environmental Radioactivity
Arne Van HoeckRonny Blust

Abstract

The biological effects and interactions of different radiation types in plants are still far from understood. Among different radiation types, external gamma radiation treatments have been mostly studied to assess the biological impact of radiation toxicity in organisms. Upon exposure of plants to gamma radiation, ionisation events can cause, either directly or indirectly, severe biological damage to DNA and other biomolecules. However, the biological responses and oxidative stress related mechanisms under chronic radiation conditions are poorly understood in plant systems. In the following study, it was questioned if the Lemna minor growth inhibition test is a suitable approach to also assess the radiotoxicity of this freshwater plant. Therefore, L. minor plants were continuously exposed for seven days to 12 different dose rate levels covering almost six orders of magnitude starting from 80 μGy h(-1) up to 1.5 Gy h(-1). Subsequently, growth, antioxidative defence system and genomic responses of L. minor plants were evaluated. Although L. minor plants could survive the exposure treatment at environmental relevant exposure conditions, higher dose rate levels induced dose dependent growth inhibitions starting from approximately 2...Continue Reading

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Citations

Nov 5, 2016·Journal of Environmental Radioactivity·Jorden van de WalleAnn Cuypers
Jan 25, 2020·International Journal of Radiation Biology·Mohsen SisakhtZahra Khoshdel
May 11, 2018·Annals of the ICRP·C Adam-GuillerminN Horemans
Jul 13, 2018·Frontiers in Plant Science·Nicol Caplin, Neil Willey
Feb 27, 2021·International Journal of Radiation Biology·Irina S Bodnar, Evgenia V Cheban
Dec 7, 2021·International Journal of Radiation Biology·Abdelghani IddarAdnane Moutaouakkil

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