title: [The cytogenetic effects in Crepis tectorum populations growing in Bryansk Province observed in the 7th year after the accident at the Chernobyl Atomic Electric Power Station].
abstract: 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.
mesh_terms: D002869:Chromosome Aberrations / Q000235:genetics*; D004781:Environmental Exposure / Q000009:adverse effects* / Q000706:statistics & numerical data; D005720:Gamma Rays; D007621:Karyotyping; D019684:Magnoliopsida / Q000235:genetics / Q000528:radiation effects*; D011210:Power Plants; D018788:Radioactive Hazard Release; D012426:Russia; D012639:Seeds / Q000235:genetics / Q000528:radiation effects; D013997:Time Factors; D014455:Ukraine
vernacular_title: Tsitogeneticheskie éffekty v populiatsiiakh Crepis tectorum, proizrastaiushchikh v Brianskoĭ oblasti, nabliudavshiesia na 7-ĭ god posle avarii na Chernobyl'skoĭ AES.