低剂量电子辐射对粳稻芽期耐冷性的影响  

Effects of Low-dose Electron Radiation for Japonica Rice's Cool-Resistance at Its Bud Stage

作　　者：斯琴图雅[1] 张晓东[1] 王强[1] 纪东清[1] 杨仲秋[1] 张郑伟[2] 高德玉[1] 

机构地区：[1]黑龙江省科学院技术物理研究所,黑龙江哈尔滨150086 [2]黑龙江大学农业资源与环境学院,黑龙江哈尔滨150080

出　　处：《安徽农业科学》2013年第17期7406-7407,共2页Journal of Anhui Agricultural Sciences

基　　金：黑龙江省科学院青年创新基金项目(CX12C02);黑龙江省科学院春苗专项课题(CM12C01)

摘　　要：[目的]为探索减轻寒地稻作区低温冷害的方法。[方法]利用低剂量电子射线播前辐射处理3种不同积温的粳稻种子,在芽期进行5℃/10 d和2℃/6 d人工低温胁迫,以存活率为指标,评价辐射对粳稻芽期耐冷性的影响。[结果]适宜剂量的电子辐射能够提高粳稻芽期耐冷性,在5℃/10 d胁迫时幼芽存活率最高增加了17.7%,2℃/6 d胁迫时幼芽存活率最高增加了33.4%,并且辐射处理间的差异为显著。[结论]不同粳稻品种对电子射线的敏感性不同,适宜的辐射剂量范围也有所不同。[ Objective ] The research aimed to explore the methods of reducing chilling at the cold rice growing area. [ Method] Using low-dose electron radiation to deal with three kinds of japonica rice seed at different accumulated temperature before planting, making artificial low temper- ature（5 ℃/10 d and 2 ℃/6 d） stress at its bud, taking survival rate as an indicator, the effect of the radiation for japonica rice＇s cool-resist- ance at its bud stage was evaluated. [ Result ] Appropriate doses of electron radiation could increase the cool-resistance of japonica rice at its bud stage. The highest survival rate increased by 17.7% at 5 ℃/10d stress, while the highest survival rate increased by 33.4% at 2 ℃/6d stress. The difference between these radiation treatments was significant. [ Conclusion] Varieties of japonica rice had different sensibility for electron- ray, and appropriate radiation dose range was different.

关 键 词：水稻 低剂量辐射 耐冷性 电子射线 

分 类 号：S511[农业科学—作物学]