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Effect of Uv Radiation and Other Abiotic Stress Factors on DNA of Different Wild Plant Species Grown in Three Successive Seasons in Alpine and Subalpine Regions

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Phyton-International Journal of Experimental Botany 2022年第2期91卷 293-313页

作者： Svetla P.Gateva Gabriele Jovtchev Tsveta v.angelova Tzvetana P.Nonova Nikolay Tyutyundzhiev Elena G.Geleva Kostadin Katrandzhiev Nina A.Nikolova Dimitar Dimitrov christo v.angelov Department of Ecosystem Research Environmental Risk Assessment and Conservation BiologyInstitute of Biodiversity and Ecosystem ResearchBAS2 Gagarin Str.1113SofiaBulgaria Nuclear Scientific Experimental Base Institute for Nuclear Researches and Nuclear EnergyBAS72 Tzarigradsko Chaussee Blvd1784SofiaBulgaria Central Laboratory of Solar Energy and New Energy Sources BAS72 Tzarigradsko Chaussee Blvd1784SofiaBulgaria National Museum of Natural History BAS1 Tsar Osvoboditel Blvd1000SofiaBulgaria

Plants in natural ecosystems are exposed to a combination of Uv radiation,ionizing radiation(IR)and other abiotic *** factors change with the *** investigated DNA alterations of some wild plants of different plant families in natural ecosystems at three altitudes in Rila Mountain,Bulgaria(1500,1782,and 2925 m above sea level(a.s.l.)exposed to Uv radiation,IR and other abiotic stresses,to assess the tolerance of plant species to the changing environmental conditions in three successive growth *** this purpose,physicochemical,cytogenetic,and molecular methods were *** damage was assessed by micronucleus test and molecular method comet assay adapted and applied by us to wild plant species from Onagraceae,Rosaceae,Boraginaceae,Saxifragaceae,Orobanchaceae,Asteraceae and Poaceae families,growing at three different *** in the DNA sensitivity and the level of tolerance was observed among the plant species in response to combined abiotic factors assessed by induced DNA damage and gross beta *** studied representatives of Poaceae were less susceptible than the other studied species at all three altitudes and showed close level of DNA injuries to that of unaffected control plant grown in laboratory *** lower levels of DNA damage of these wild plant species corresponded to their lower ability to accumulate *** was a particularly pronounced low level of DNA injuries in the plant species at the highest *** level of DNA damage showed correlation with the values of some abiotic environmental *** results would contribute to the elucidation of the extent of adaptation of plant species to the continuously changing environment and would be useful in selecting sensitive herbaceous monitor species for environmental impact assessment at mountain and alpine sites.

关键词： Altitude climatological conditions DNA damage natural Uv radiation and ionizing radiation wild plant species

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