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Variation in the seed progeny of smooth brome grass, Bromus inermis Leyss., under conditions of chronic irradiation in the zone of the Eastern Ural Radioactive Trace

  • This Number of the Journal is Dedicated to the 70th Anniversary of Institute of Plant and Animal Ecology, Ural Branch, Russian Academy of Sciences
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Abstract

Long-term studies have been performed on the seed progeny of B. inermis from test plots established along the radioactive contamination gradient in the zone of the Eastern Ural Radioactive Trace (EURT), where dose loads on maternal plants and embryos of seeds from chronically irradiated cenopopulations (with natural background radiation taken into account) exceed control values by factors of 2 to 107. Interannual and individual variation in the viability, mutability, and radiosensitivity of the seed progeny has been revealed. Against the background of high interpopulation variation in test parameters in the EURT zone, weather conditions appear to have no significant effect on seed quality, while such effects are appreciable in background cenopopulations. It has been shown that a positive correlation exist between the initial viability of the seed progeny and their radioresistance. Chronic irradiation in a wide dose range induces an increased frequency of different mutations and morphological modifications. The contents of low-molecular antioxidants in seedlings from impact cenopopulations proved to be higher than in the background sample. The results obtained characterize the potential of protective and restorative mechanisms acquired in the course of evolution that allow plants to survive in the changing environment under exposure to technogenic stress.

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Authors and Affiliations

  1. Institute of Plant and Animal Ecology, Ural Branch, Russian Academy of Sciences, ul. Vos’mogo Marta 202, Yekaterinburg, 620144, Russia

    E. V. Antonova, V. N. Pozolotina & E. M. Karimullina

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  1. E. V. Antonova
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  2. V. N. Pozolotina
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  3. E. M. Karimullina
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Correspondence to E. V. Antonova.

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Original Russian Text © E.V. Antonova, V.N. Pozolotina, E.M. Karimullina, 2014, published in Ekologiya, 2014, No. 6, pp. 459–468.

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Antonova, E.V., Pozolotina, V.N. & Karimullina, E.M. Variation in the seed progeny of smooth brome grass, Bromus inermis Leyss., under conditions of chronic irradiation in the zone of the Eastern Ural Radioactive Trace. Russ J Ecol 45, 508–516 (2014). https://doi.org/10.1134/S1067413614060034

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  • DOI: https://doi.org/10.1134/S1067413614060034

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