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采用同一剂量同一剂量率的60Co-γ射线昼夜每隔2小时照射萌动水稻种子的试验结果表明:由于萌动的种子处于不同的生理状态和不同的细胞周期,故对辐射的敏感性有所不同,因而对M_1代产生的生理损伤(成苗率、苗高及育性等)以及M代秧苗叶绿素突变和植株农艺性状的变异频率也有所不同,其中以浸种后72-74小时照射对M_1生理损伤最明显,M_2的突变频率也较高,存在一定的相关性.同时辐射对细胞的有丝分裂有明显的抑制效应,对整个细胞周期有延缓作用.
The results showed that the radiation sensitivity of 60Co-γ-ray irradiated with the same dose of the same dose of the same radiation every 2 hours day and night was different because of germinating seeds in different physiological states and different cell cycle, Therefore, the frequency of physiological damage (seedling emergence rate, seedling height and fertility, etc.) and M-generation seedling chlorophyll mutation and plant agronomic trait were also different to M_1 generation. The physiological damage of M_1 The most obvious, M_2 mutation frequency is higher, there is a certain correlation.At the same time, radiation has a significant inhibitory effect on cell mitosis, the entire cell cycle has a retardation effect.