Results of cytogenetic studies of seeds after their extended orbital flight aboard the Salyut orbital scientific station.
Air-dry seeds of Lactuca sativa (lettuce) with a different level of spontaneous mitagenesis were used in these experiments. A part of the seeds was given pre-flight gamma radiation in doses of 1 and 10 krads. Comparison of the results for the in-flight experiments, laboratory and "transport" control showed an increase of cells with chromosome aberrations and an increase of radiobiological effect in irradiated seeds flown aboard the Salyut scientific station. A comparative analysis was made of the cytogenetic changes in seeds after their exposure to different periods of weightlessness during the Cosmos 368, Zond 8 and Salyut missions. The effect of weightlessness of different duration on the development of cytogenetic changes in irradiated and unirradiated seeds is discussed.
Nevzgodina
L V
LV
Grigoryev
Y G
YG
Papyan
N M
NM
Skukina
I S
IS
Farber
Y V
YV
D002869:Chromosome Aberrations; D003359:Cosmic Radiation; D005118:Extraterrestrial Environment; D005720:Gamma Rays; D018545:Lactuca / Q000235:genetics / Q000254:growth & development / Q000528:radiation effects*; D016296:Mutagenesis; D009154:Mutation; D012639:Seeds / Q000166:cytology / Q000235:genetics / Q000528:radiation effects*; D013026:Space Flight; D014893:Weightlessness