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<p>Our previous investigations have shown that progeny of chronically exposed pine trees from the Chernobyl affected zone is characterized by high mutation rates. In this connection, a question arises: whether an increased level of mutagenesis in chronically exposed Scots pine populations leads to changes in the reproductive ability of pine trees and can be considered an ecological factor that increases the resistance of plant progeny to radiation exposure? To answer this question, the state of the seed progeny in Scots pine populations from the Polesie State Radiation-Ecological Reserve (PSRER), which received high doses of radiation in the first period of the Chernobyl accident and experienced chronic exposure for 35&#xa0;years, was assessed. It was shown that, based on 3 years of observations, Scots pine seed progeny from the most contaminated sites of the PSRER (absorbed by seeds doses up to 166&#xa0;mGy/year) is characterized by an increased frequency of cytogenetic abnormalities and abortive seeds. However, increased resistance of seed progeny to additional irradiation according to the test “frequency of cytogenetic abnormalities” has not been detected.</p>

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Increased frequency of cytogenetic abnormalities and abortive seeds in Scots pine populations from the most contaminated sites of the Polesie State Radiation-Ecological Reserve, Belarus

  • 期刊论文

  • 发表日期：

    2025年12月18日

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  • Stanislav A. Geras’kin,
  • Denis V. Vasiliyev,
  • Alexander A. Prazyan,
  • Maria A. Lychenkova

摘要

Our previous investigations have shown that progeny of chronically exposed pine trees from the Chernobyl affected zone is characterized by high mutation rates. In this connection, a question arises: whether an increased level of mutagenesis in chronically exposed Scots pine populations leads to changes in the reproductive ability of pine trees and can be considered an ecological factor that increases the resistance of plant progeny to radiation exposure? To answer this question, the state of the seed progeny in Scots pine populations from the Polesie State Radiation-Ecological Reserve (PSRER), which received high doses of radiation in the first period of the Chernobyl accident and experienced chronic exposure for 35 years, was assessed. It was shown that, based on 3 years of observations, Scots pine seed progeny from the most contaminated sites of the PSRER (absorbed by seeds doses up to 166 mGy/year) is characterized by an increased frequency of cytogenetic abnormalities and abortive seeds. However, increased resistance of seed progeny to additional irradiation according to the test “frequency of cytogenetic abnormalities” has not been detected.