Hordeum vulgare var. Himalaya seeds were irradiated with gamma rays and hydrated in protium or deuterium water. The frequency of radiation-induced chromosome aberrations was lower in the deuterated material. The reduced frequency of chromosome aberrations was coupled with a delay of the early stages, an inhibition of the late stages of mitotic division, and an increase in the melting temperature (Tm) of the deoxyribonucleic acid. The decrease in the radiation-induced damage, in the presence of deuterium water, is attributed to the immobilization of the broken ends of the chromosomes due to the delay of the mitosis and the increased stability of the deoxyribonucleic acid molecule, both of them favoring the reconstitution of the broken ends.

This content is only available as a PDF.
You do not currently have access to this content.