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- W2056517476 abstract "To gain insight into the mutagenic effects of accelerated heavy ions in plants, the mutagenic effects of carbon ions near the range end (mean linear energy transfer (LET): 425keV/μm) were compared with the effects of carbon ions penetrating the seeds (mean LET: 113keV/μm). Mutational analysis by plasmid rescue of Escherichia coli rpsL from irradiated Arabidopsis plants showed a 2.7-fold increase in mutant frequency for 113keV/μm carbon ions, whereas no enhancement of mutant frequency was observed for carbon ions near the range end. This suggested that carbon ions near the range end induced mutations that were not recovered by plasmid rescue. An Arabidopsis DNA ligase IV mutant, deficient in non-homologous end-joining repair, showed hyper-sensitivity to both types of carbon-ion irradiation. The difference in radiation sensitivity between the wild type and the repair-deficient mutant was greatly diminished for carbon ions near the range end, suggesting that these ions induce irreparable DNA damage. Mutational analysis of the Arabidopsis GL1 locus showed that while the frequency of generation of glabrous mutant sectors was not different between the two types of carbon-ion irradiation, large deletions (>∼30kb) were six times more frequently induced by carbon ions near the range end. When 352keV/μm neon ions were used, these showed a 6.4 times increase in the frequency of induced large deletions compared with the 113keV/μm carbon ions. We suggest that the proportion of large deletions increases with LET in plants, as has been reported for mammalian cells. The nature of mutations induced in plants by carbon ions near the range end is discussed in relation to mutation detection by plasmid rescue and transmissibility to progeny." @default.
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- W2056517476 date "2012-03-01" @default.
- W2056517476 modified "2023-09-27" @default.
- W2056517476 title "Mutagenic effects of carbon ions near the range end in plants" @default.
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- W2056517476 doi "https://doi.org/10.1016/j.mrfmmm.2011.10.004" @default.
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