Present results of the joint radiobiological ESA/IBMP experiments ``seeds'' aboard cosmos 2044 and 2229 - correlation of micro-dosimetric data and damage endpoints in arabidopsis thaliana plants

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Scientific paper

Experimental data obtained from two Cosmos missions (2044, 2229) performed with dry plant seeds of Arabidopsis thaliana in a Biostack configuration are compared. Biological stress and genetic risk are induced in dry seeds by cosmic radiation, especially the high energetic, densely ionizing component of heavy ions (HI). Subdivision of impacting HI particles into LET-groups (15-35; 35-100; >100 keV/mum) showed the contribution of each LET group to the induction of different biological damage endpoints (survival, cell transformation, lethal plant development). An attempt is presented to comprehend the influence of the spatial energy deposition as a biophysical HI track parameter.

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