[The cytogenetic effect in the cells of the needles of the common pine from irradiation resulting from the accident at the Chernobyl Atomic Power Station].

The consequences of Pinus sylvestris irradiation were studied since 1987-1990. The chromosome aberrations in needle cells and morphological changes are annually observed at the same level, that confirms the continuous character of mutagenesis and morphogenesis. It is concluded that the big pool of damages is caused by radiation, one part of them is realized in chromosome aberration during the first vegetation after irradiation. The other part of them is transferred by division during the initial cell bud differentiation to the specialized cells and is realized to aberrations during the following vegetative periods.