水稻种子在用γ射线照射前先行液氮冷冻处理会加剧二叶期秧苗的生理损伤程度,若再予以咖啡因浸种处理,则损伤进一步加剧。俟秧苗进入三叶期以后,生物损伤的加剧作用很快消失,但对抽穗期的延迟仍有影响。 γ射线与咖啡因的交互作用见于水稻生长后期,反映在结实率上较为明显。 二叶期的苗高与总根长,苗高与成苗率之间存在高度相关。 液氮与咖啡因可视为辅助的诱变因子。 Cryogenic treatment of rice seeds with γ-ray irradiation aggravates the physiological damage of two-leaf stage seedlings. If soaked with caffeine, the damage is further aggravated.俟 seedling into the clover period, the aggravating role of biological damage quickly disappeared, but the delay of heading still affected. Interaction between γ-rays and caffeine is found in the late rice growth stage, which is reflected in the seed setting rate. Two-leaf stage of the seedling height and total root length, seedling height and seedling rate is highly correlated. Liquid nitrogen and caffeine can be considered as auxiliary mutagens.