RESUMEN
Changes of important cytogenetical indices, like an yield of aberrant cells and their burden by damages, with dose value was shown at the study of genetical consequences of winter rye contamination with radioactive Chernobyl NPP fallout at the acute phase (the vegetation period of 1986). Larger genetical efficiency was demonstrated for low dose rate radiation. Stimulation of morphometric indices in rye seedlings characterizing their survival on the earlier stages of ontogenesis was observed together with significant increase of the cytogenetical damages.
Asunto(s)
Centrales Eléctricas , Ceniza Radiactiva/efectos adversos , Liberación de Radiactividad Peligrosa , Secale/genética , Secale/efectos de la radiación , Aberraciones Cromosómicas , Relación Dosis-Respuesta en la Radiación , Semillas/genética , Semillas/efectos de la radiación , Factores de Tiempo , UcraniaRESUMEN
Statistical analysis of natural experimental data's, that be derived in 30-km zone of Chernobyl APS to study cytogenetic action of super low doses (0.06-3.30 cGy in the course of vegetative period) chronic irradiation on combined technogenic pollution background, demonstrated that irradiation in this doses range does not bring the certain registering contribution in obtaining genetic changeability. Significant difference between experimental areas in chromosomal aberrations level's, that be established with help boot straep-method, is determined apparently by heavy metals genotoxic action.
Asunto(s)
Contaminación Ambiental , Mutagénesis/efectos de la radiación , Accidentes , Aberraciones Cromosómicas/fisiología , Relación Dosis-Respuesta en la Radiación , Humanos , Reactores Nucleares , Factores de Tiempo , UcraniaRESUMEN
In a field study in 1989, the effect of additional UV-B-irradiation (with an intensity of 0.34, 0.49 or 0.77 W/m2, daily exposure of 17.3, 26.7 or 39.1 kJ/m2, and total exposure of 1457.3, 2248.8 or 3285.6 kJ/m2) on the growth, development and productivity of fodder beet var. Eckendorf yellow was investigated. The three levels of irradiation caused a delay of plant growth and a significant reduction of plant height (18-26%), air-dry weight of leaves (32-43%), wet weight of leaves (48-52%), and weight of root-crops (48-50%).