Related Papers
Journal of Environmental Radioactivity
Effects of long-term chronic exposure to radionuclides in plant populations
2013 •
Alla Oudalova, Stanislav Geras'Kin
Journal of Environmental Radioactivity
Adaptation to ionizing radiation of higher plants: From environmental radioactivity to chernobyl disaster
2020 •
MARIA GRAZIA CASCONE
Effects of Chronic Ionizing Radiation and Interactions with Other Environmental and Climatic Factors on Plant Growth and Development
2017 •
Snejana Dineva
Plants are the main supportive human being system. Under insistently exposure to mutagens, such as low ionizing doses radiation, enhance level UV-B radiation, chemicals, heat, drought, and cold, they are enforces either to adapt either to die. Ordinarily is accepted that the living organisms under the influence of environmental stress factors, always acquire adaptive responses, but the available data still stay controversial. The effects of chronic exposure on living organisms and populations still stay insufficiently explored, and denote a much needed field of research. The aim of a review is to summarize published data for consequences of chronic ionizing radiation on plant growth and development. Epigenetic and genetic alterations were registered in plants arising under combined influence of different environmental stress conditions. Nevertheless, there are still not enough information for the combined effects of ionizing radiation, enhance level UV-B radiation, which are already registered as results from climatic changes and so expected to have important role in the future on plants populations. The increased pollution of the environment is out of the doubt, but the knowledge about mechanisms and the range of plants to adapt is still insufficient.
Impact assessment of long-term chronic radiation exposure on plant populations
Alla Oudalova
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.
Arhiv za higijenu rada i toksikologiju
Evaluation of toxic and genotoxic effects of low-level 137Cs ionising radiation on plants
2006 •
Danguole Montvydiene
The aim of this study was to evaluate the impact of low internal exposure to 137Cs on L. sativum meristem cells and Tradescantia stamen hair cells. It also compared the impact of 137Cs internal and external irradiation of similar level on the plant seed germination and root growth. Compared to control, the tested internal (0.0007 mGy to 0.7 mGy) and external (0.04 mGy to 5.5 mGy) 137Cs ionising radiation doses stimulated the elongation of L. sativum roots by 11% to 12% and 24% to 33%, respectively. Internal 137Cs exposure (0.0003 mGy to 0.5 mGy) for 14 days caused 1.2% to 1.6% of somatic mutations and 19% to 87% of non-viable stamen hair in Tradescantia.
CYTOLOGIA
Comparative sensitivity of plant root meristems to acute gamma irradiation according to stationary phase cell distribution and DNA content
1982 •
Thomas Rost
Radiatsionnaia biologiia, radioecologiia / Rossiĭskaia akademiia nauk
[Mechanism of induction of cytogenetic damage in plant meristematic cells caused by combined effect of heavy natural radionuclides and heavy and alkaline metals]
Stanislav Geras'Kin
The analysis of experimental data on the combined effect of 232Th and water from melted snow containing metal ions from industrally loaded territories on Tradescantia (clone 02) and on Allium shoenoprasum meristematic root tip cells treated with heavy natural radionuclides from natural water sources in the area of radioactive wastes storehouse is presented. It was demonstrated that plant meristematic cells response to heavy metals and heavy natural radionuclides, both from two-component model system and from natural water sources, have commom features.
Effects of radioactive contamination on plants: implications for radiological protection of the environment
2000 •
Alla Oudalova
Genetic consequences of radioactive contamination by the Chernobyl fallout to agricultural crops
Alla Oudalova
The genetic consequences of radioactive contamination by the fallout to agricultural crops after the accident at the Chernobyl NPP in 1986 have been studied. In the first, acute, period of this accident, when the absorbed dose was primarily due to external β-and γ-irradiation, the radiation injury of agricultural crops, according to the basic cytogenetic tests, resembled the effect produced by acute γ-irradiation at comparable doses. The yield of cytogenetic damage in leaf meristem of plants grown in the 10-km zone of the ChNPP in 1987–1989 (the period of chronic, lower level radiation exposure) was shown to be enhanced and dependent on the level of radioactive contamination. The rate of decline with time in cytogenetic damage induced by chronic exposure lagged considerably behind that of the radiation exposure. Analysis of genetic variability in three sequential generations of rye and wheat revealed increased cytogenetic damage in plants exposed to chronic irradiation during the 2nd and 3rd years.
rri.kyoto-u.ac.jp
Cytogenetic Effect of Low Dose γ-Radiation in Plant Test-Systems: Non-Linear Dose-Effect Relationship
David Copplestone, Alla Oudalova
