【摘要】 用³H-胸腺嘧啶核苷渗入法,研究受⁶⁰Co-γ射线各种剂量（10、20、30、40千伦,剂量率836伦/分）照射的花生和水稻种胚萌发早期DNA合成率的变动。结果表明,受γ辐射的花生和水稻种胚出现非按时的DNA合成,用咖啡碱能够抑制这种合成,这种非按时的DNA合成与γ辐射剂量有一定的关系。本研究工作证明了:在上述两种植物的细胞中具有修复DNA损伤的功能。更多还原

【Abstract】 The unscheduled DNA synthesis in embryos of peanut and rice irradiated with γ-ray was studied. The results showed that the rate of DNA synthesis during the early stage of soaking of γ-irradiated seeds (10-20 KB for peanut and 10-30 KB for rice) was larger than that of non-irradiated seeds and radiation with higher doses (30-40 KR) suppressed 3H-TdB incorporation. This kind of incorporation was inhibited by caffeine. This indicated that the γ-radiation induced incorporation of 3H-TdR during the early stage of germinating seeds might be correlated with DNA repair phenomenon.更多还原