Adaptation and Impairment of DNA Repair Function in Pollen of Betula verrucosa and Seeds of Oenothera biennis from Differently Radionuclide-contaminated Sites of Chernobyl

Boubriak, Ivan; Grodzinsky, D.M.; Polischuk, V. P.; Naumenko, V.; Gushcha, N. P.; Micheev, A. N.; McCready, Shirley; Osborne, Daphne J.

doi:10.1093/aob/mcm276

Cited by 57 publications

(36 citation statements)

References 41 publications

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“…Moreover, the results remain qualitatively the same after the considerable variation in the dose rate of acute irradiation (from 2970 Gy/h to 39 Gy/h). An improved DNA repair capacity and ability to germinate under abiotic stress was shown in seeds embryos of evening primrose growing near the Chernobyl NPP on sites contaminated with -and -emitters, while on the -, -and -contaminated site such an improvement was not found [19]. This is in line with data on the successful adaptation of wild vetch populations on sites most highly contaminated by -emitters, but not by -emitters [20].…”

Section: Resultssupporting

confidence: 85%

Impact assessment of long-term chronic radiation exposure on plant populations

et al. 2011

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Abstract. Studies that examine biological effects on non-human biota in natural settings provide a unique opportunity for obtaining information about the potential biological hazard associated with radioactive contamination. The results of long-term field study in the Bryansk Region, Russia, affected by the Chernobyl accident are discussed. Plant populations growing in areas with relatively low levels of pollution are characterized by the increased level of both cytogenetic alterations and genetic diversity. In particular, radioactive contamination of the plants' environment activates genetic mechanisms, changing a population's resistance to exposure. However, there are radioecological situations where enhanced radioresistance has not evolved or has not persisted. A development of a system for protection of the environment from ionizing radiation should be based on a clear understanding of these effects and their contribution to response of populations.

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Section: Resultssupporting

confidence: 85%

Impact assessment of long-term chronic radiation exposure on plant populations

et al. 2011

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“…Similarly, acute c-irradiation of seeds from a wild vetch population that had been inhabiting a site with enhanced levels of natural radioactivity in the north of Russia for long time, resulted in a rather high radiosensitivity in the assays of ''frequency of cytogenetic disturbances in meristematic root tip cells'', ''rate of germination'' and ''survival rate at the end of vegetation period'' (Geras'kin et al 2007). An improved DNA repair capacity and ability to germinate under abiotic stresses (salinity and accelerated ageing) was shown in seed embryos of evening primrose growing near the Chernobyl NPP on sites contaminated with c-and b-emitters, while on the a-, b-and c-contaminated site such an improvement was not found (Boubriak et al 2008). This is in line with data on the successful adaptation of wild vetch populations living on sites most highly contaminated by b-emitters, but not by a-emitters (Syomov et al 1992).…”

Section: Discussionmentioning

confidence: 97%

Effects of radioactive contamination on Scots pines in the remote period after the Chernobyl accident

et al. 2011

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A 6 year study of Scots pine populations inhabiting sites in the Bryansk region of Russia radioactively contaminated as a result of the Chernobyl accident is presented. In six study sites, (137)Cs activity concentrations and heavy metal content in soils, as well as (137)Cs, (90)Sr and heavy metal concentrations in cones were measured. Doses absorbed in reproduction organs of pine trees were calculated using a dosimetric model. The maximum annual dose absorbed at the most contaminated site was about 130 mGy. Occurrence of aberrant cells scored in the root meristem of germinated seeds collected from pine trees growing on radioactively contaminated territories for over 20 years significantly exceeded the reference levels during all 6 years of the study. The data suggest that cytogenetic effects occur in Scots pine populations due to the radioactive contamination. However, no consistent differences in reproductive ability were detected between the impacted and reference populations as measured by the frequency of abortive seeds. Even though the Scots pine populations have occupied radioactively contaminated territories for two decades, there were no clear indications of adaptation to the radiation, when measured by the number of aberrant cells in root meristems of seeds exposed to an additional acute dose of radiation.

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“…Improved DNA repair capacity and an ability to germinate under abiotic stress (salinity and accelerated ageing) were shown in embryos of evening primrose (Oenothera biennis L.) growing near the Chernobyl NPP on sites contaminated with g-and b-emitters, while in seeds from the a-, b-and g-contaminated site such adaptation was not found (Boubriak et al, 2008). This is similar to findings for successful adaptation of wild vetch (Vicia cracca L.) populations on sites highly contaminated with b-, but not with a-emitters (Syomov et al, 1992).…”

Section: Radioadaptationmentioning

confidence: 99%