Abstract
Experiments were conducted to find out the influence of hyperthermic treatments on the biological activity of 1, 3-propane sultone. Hyperthermic (35-45°C) pretre-atments for 1-4 hours gave significant protection against the biological damage pro-duced by the mutagen. Seedling injury was reduced from 36 to 8% and root injury totally eliminated. Chromosome aberrations in root tip cells were reduced by one half. Hyperthermic post-treatments, however, were ineffective.
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