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为探讨马鞍型剂量效应曲线的形成机制,研究了盐胁迫、真空胁迫处理对低剂量辐照诱导效应的影响。利用不同剂量的γ射线(60、90、120、150、210、282、423和560 Gy)辐照水稻种子后,以苗高为辐射损伤的生物学终点,调查γ射线辐照种子经真空处理和不同浓度的NaCl胁迫处理的损伤情况,利用Origin 8.0软件对剂量-苗高数据进行线性拟合;结果表明:低剂量辐照既能诱导对真空胁迫、盐胁迫的适应性反应,同时又和真空胁迫、盐胁迫具有协同抑制水稻苗高的作用,获得的剂量-苗高曲线为马鞍型的形状。低剂量辐照加上环境因子胁迫,对水稻种子产生的适应性反应可能是马鞍型剂量-效应曲线的形成机制。
In order to explore the formation mechanism of the saddle-type dose-response curve, the effects of salt stress and vacuum stress on the induction effect of low dose radiation were studied. After irradiating rice seeds with different doses of γ rays (60, 90, 120, 150, 210, 282, 423 and 560 Gy), the seedling height was taken as the biological end point of radiation damage and the irradiated γ- And salt stress treatment at different concentrations. Origin 8.0 software was used to fit the dose-height data linearly. The results showed that the low dose radiation induced the adaptive response to vacuum stress and salt stress, Under vacuum stress and salt stress, synergistic inhibition of rice seedling height was achieved. The obtained dose-height curve was saddle shape. Low-dose radiation plus environmental factor stress, the adaptive response to rice seeds may be saddle-type dose-response curve formation mechanism.