Cytogenetic analysis of seedlings from the seeds of four populations of Crepis tectorum plants grown during 7 years in localities of Bryansk Province contaminated with radioactive products was carried out. The frequency of chromosome aberrations in root meristematic cells was higher than at similar dose rates within 30-km zone of the Chernobyl NPP. At the same frequency of chromosome aberrations (induced at higher dose rates) karyotypes with pronounced frequency were observed in 30-km zone of the Chernobyl NPP. In Bryansk Province karyotypes were not found. This fact can be explained by the following: irradiation which induced the bulk of chromosome aberrations took place not at the stages of meiosis-early embryogenesis when the induction of chromosome aberrations leading to changed karyotype was more possible but after that.
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January 2025
Institut Sophia Agrobiotech, INRAE, Université Côte d'Azur, CNRS, 400 routes des Chappes, 06903, Sophia-Antipolis, France.
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