Influence of a long duration exposure, 69 months, to the space flight factors in Artemia cysts, tobacco and rice seeds. |
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Authors: | H Planel Y Gaubin B Pianezzi M Delpoux J Bayonove J C Bes C Heilmann G Gasset |
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Institution: | Laboratoire de Radiobiologie et Biologie Spatiale, Toulouse, France. |
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Abstract: | Three french laboratories have participated in the Free Flyer Biostack experiment. Artemia cysts, tobacco seeds and rice caryopsis and embryos were used. Biological objects in monolayers were dead. In opposite, a large fraction of samples used in bulk survived. A stimulatory effect occurred in the first steps of development in Artemia cysts. In fact, the larval survival was unchanged or slightly reduced. In tobacco a drastic decrease in germination and survival rate was observed. Space flight did not induce genetic changes. In rice, results depend on the variety which was investigated; the growth rate stimulation in flight samples is discussed with respect to controls. |
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