Further Studies on the Reversal in the Seedling Height Dose Curve at Very High Levels of Ionizing Radiations

The growth of seedlings irradiated as seeds with high doses is shown to be dependent on two main factors-chromosomal damage and rate of mitosis. The interaction of these factors is responsible for the reversal of the dose curve where seedling height is plotted against dose. At the very high doses, a point is reached where the effect of increased chromosomal damage is masked by the cessation of cell division.