The recovery of a structural architectonics of root meristem after the effect of irradiation

The maintenance and the restoration of a topology of cell rows in the radiation-injured meristem are achieved by the repopulation and via the substitution of damaged cells and rows. New cellular rows probably move in the damaged tissues by intrusive and symplastic growth. The advance of aberrant cells and polycells to the elongation zone slows down or is blocked via the interruption of symplastic growth. The local recovery processes are accompanied by a change in the linearity of packing cells. At 50% level of aberrant anaphases, the mentioned mechanisms of recovery prove to be ineffective. So, the recovery follows a more radical mechanism - regeneration, which leads to the complete replacement of the apex issues. The possibilities of the apex recovery are probably limited by the 'critical mass' of meristematic cells and the degree of damage of the elongation zone.