The role of weightlessness in the genetic damage from preflight gamma-irradiation of organisms in experiments aboard the Salyut 6 orbital station
| Autor: | A.L. Mashinsky, I.D. Anikeeva, E.N. Vaulina, L.N. Kostina, I.G. Kogan, L.R. Palmbakh |
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| Rok vydání: | 1981 |
| Předmět: |
Atmospheric Science
Time Factors Arabidopsis Aerospace Engineering Germination Biology Orbital station Ionizing radiation Meiosis Animals Irradiation Mutation frequency Chromosome Aberrations Weightlessness Crepis capillaris Astronomy and Astrophysics Plants Space Flight biology.organism_classification Geophysics Drosophila melanogaster Nondisjunction Space and Planetary Science Gamma Rays Seeds Biophysics General Earth and Planetary Sciences Female |
| Zdroj: | Advances in space research : the official journal of the Committee on Space Research (COSPAR). 1(14) |
| ISSN: | 0273-1177 |
| Popis: | The effect of weightlessness on chromosomal aberration frequency in preflight irradiated Crepis capillaris seeds, on the viability, fertility and mutation frequency in Arabidopsis thaliana , and on the frequency of nondisjunction and loss of X chromosomes in preflight irradiated Drosophila melanogaster gametes was studied aboard the Salyut 6 orbital station. The following effects were observed: a flight-time dependent amplification of the effects of preflight -irradiation in A . thaliana with respect to all the parameters studied; unequal effects in seeds and seedlings of Crepis capillaris ; and a significant increase in the frequency of nondisjunction and loss of chromosomes during meiosis in Drosophila females. These observations are discussed in terms of the data of ground-based model experiments and flight experiments with a different time of exposure of objects to weightlessness. An attempt is made to elucidate the role of weightlessness in the modification of ionizing radiation effects. |
| Databáze: | OpenAIRE |
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