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Both UVB radiation and DNA-breaking agents were previously reported to kill Arabidopsis stem cells. We demonstrate that death induced by UVB or by ionizing radiation (IR) requires Suppressor of Gamma Response 1 (SOG1), a transcription factor already found to govern many responses to these agents in Arabidopsis. DNA-damage responses (DDRs) triggered primarily by replication-blocking photoadducts or...
Little work has been done on the mechanism of low dose hyper-radiosensitivity (HRS) and later appeared radioresistance (termed induced radioresistance (IRR)) after irradiation with medium and high linear energy transfer (LET) particles. The aim of this study was to find out whether ATR pathway is involved in the mechanism of HRS induced by high LET radiation. GM0639 cells and two ATM deficient/mutant...
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