离子注入水稻种子的细胞生物学效应

Cytological Effects of Ion Implantation on Rjce Seeds

以氮离子注入水稻休眠种子，６０Ｃｏγ辐照作对比，研究Ｍ１代的细胞生物学效应。结果表明，离子注入可诱发染色体结构变异，抑制根尖细胞有丝分裂，随着离子注入剂量的提高，染色体畸变细胞率呈增加趋势，但高能量（３０ｋｅＶ）离子辐照反而出现一饱和状态。离子注入的染色体诱变效应低于γ辐照，但对有丝分裂指数的影响与γ辐照相似。不同品种对不同诱变源的辐射敏感性表现不一致。

After rice seeds implanted by nitrogen ion beam,the rate of cells with chromosomalaberration tended to increase with ion implanting dose raised. However,it was lower than thatinduced by 60Coγ rays.There was a stationery phenomenon of chromosomal aberration when30keV ion beam was implanted.At the sametime,the inhibitory effects of ion implanation andγ rays radiation on mitoses were similar.Furthermore,the radiosensitivity of three rice varietiesvaried depending on the treatment:radiated by ion beam or by γ rays.