title: [Cytogenetic and anatomic features of the weeping birch in the 30-km zone surrounding the Novovoronezh nuclear power plant].
abstract: We studied the development of the vegetative and generative spheres in the weeping birch from the 30-km zone surrounding the Novovoronezh nuclear power plant. Being the most sensitive ontogenetic stages, the mitotic and meiotic processes are capable of responding to the effects of various factors, including unfavorable environmental factors. Studies were carried out from 1998 to 2000 in Novovoronezh under conditions of potential hazard for normal development (a possible joint effect of chronic ionizing irradiation at low doses from the Novovoronezh nuclear power plant and elevated concentrations of some chemical substances as side products of the plant activity) and in the ecologically pure territory of the Biological Station Venevitinovo of the Voronezh State University. Significant deviations from the normal course of mitotic and meiotic processes have been recorded in the experimental variant and specific types of disturbances have been described. A suggestion has been put forward concerning some mechanisms underlying the weeping birch adaptation to unfavorable environmental conditions. Specifically, it was shown that the trees studied were of a mixoploid nature. No such studies have ever been carried out in the region of this nuclear power plant, one of the oldest in Russia.
authors.affiliation: Voronezh State University, Universitetsaya pl. 1, Voronezh, 394693 Russia.
authors.forename: A K
authors.initials: AK
authors.lastname: Bytorina
authors.forename: E V
authors.initials: EV
authors.lastname: Kormilitsyna
mesh_terms: D000222:Adaptation, Physiological; D029662:Betula / Q000033:anatomy & histology* / Q000235:genetics* / Q000528:radiation effects; D020732:Cytogenetic Analysis; D008540:Meiosis; D008938:Mitosis; D008940:Mitotic Index; D011210:Power Plants; D012639:Seeds / Q000502:physiology / Q000528:radiation effects; D014197:Trees / Q000033:anatomy & histology / Q000235:genetics / Q000528:radiation effects
vernacular_title: Tsitogeneticheskie i anatomicheskie ocobennosti berezy povisloi iz tridzatikilometrovoi zony Novovoronezhskoi AC'C.