Coniferons forests in the thirty kilometer zone of the Chernobyl' NPP

Four zones of pine forests are distinguished on basis of contamination degree: the lethal zone with complete pine ruin, 'red forest', the sublethal zone with partial pine daying off and mass branch dry up; zone of an average lesion with depression of growth processes and a morphose formation; zone of a weak exposure, where the radiation effect expressed in pine reproductive, sphere changes. It is noted, that the pine reproductive structures have most sensitivity, to the radiation induced ionization. Morphofunctional peculiaryties of the pine reaction to the radiation exposure in the accident region. A hypothesis in proposed. In accordance with the hypothesis the high radiosensitivity phenomenon of conifers is due to their two structural-metabolic peculiarities: by a considerable dimensions of nuclei-chromosomal complex at the high nucleoproteides content and by a lipid metabolism predomination in the all important links of the metabolism. 24 refs.; 3 tabs