The action of space flight factors on the radiation effects of additional gamma-irradiation of seeds.
The action of space flight factors (SFF) on radiosensitivity and the effects of preflight irradiation of air-dried Crepis capillaris (L) Wallr and Arabidopsis thaliana (L) Heynh seeds aboard the spaceships of the Cosmos, Soyuz and Salyut series was studied. The results have shown that vibration and linear acceleration (VA) cause damage of the meristematic embryonic cells and simultaneously decrease the radiosensitivity of seeds. SFF enhance the effect of preflight gamma-irradiation of seeds with respect to a number of characteristics. This can be explained partly by the action of VA. The basis of all observed effects is chromosomal aberrations which are expressed in a series of successive cell divisions and which decrease the survival and fertility of plants that grow from flight-exposed seeds.
Anikeeva
I D
ID
USSR Academy of Sciences, Moscow, USSR.
Vaulina
E N
EN
Kostina
L N
LN
D000054:Acceleration; D017360:Arabidopsis / Q000235:genetics / Q000254:growth & development / Q000528:radiation effects*; D002869:Chromosome Aberrations; D027468:Crepis / Q000235:genetics / Q000254:growth & development / Q000528:radiation effects*; D005720:Gamma Rays; D018525:Germination; D009154:Mutation; D011836:Radiation Tolerance; D012639:Seeds / Q000235:genetics / Q000254:growth & development / Q000528:radiation effects*; D013026:Space Flight; D014732:Vibration; D014893:Weightlessness