Present results of the joint radiobiological ESA/IBMP experiments “seeds” aboard Cosmos 2044 and 2229 - correlation of micro-dosimetric data and damage endpoints in <i>Arabidopsis thaliana</i> plants期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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*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**

Authors:	KE Gartenbach AR Kranz MW Zimmermann E Schopper B Baican J-U Schott C Heilmann VV Schevchenko

Institution:	^* Botanical Institute, Johann Wolfgang Goethe Universität, P.O.B. 111932, D-60054, Frankfurt am Main, Germany ^ Institute of Nuclear Physics, Johann Wolfgang Goethe Universität, P.O.B. 111932, D-60054, Frankfurt am Main, Germany ^* Institute of Aerospace Medicine, Biophysics Division, DLR-German Aerospace Research, P.O.B. 90 60 58, D-51140, Köln, Germany ^† Centre de Recherche Nucléaire, Rue de Loess 62, F-67084, Strasbourg, France ^‡ N. K. Koltzov-Institute of Developmental Biology, Acad. Sci., Moscow, Russia

Abstract:	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 eavy ons (HI). Subdivision of impacting HI particles into LET-groups (15–35; 35–100; >100 keV/μm) 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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