摘要
采用不同种类的化学诱变剂处理水稻种子,研究其萌发和生长情况,结果表明,随着化学诱变剂处理浓度的增加,水稻种子的发芽势、发芽率、活力指数、根芽生长量等指标基本上呈下降趋势。但低浓度的EMS(0.5%)、MNU(0.05%)具有提高水稻种子发芽率、发芽势、活力指数以及促进晚稻种子根和幼芽生长的作用;高浓度的EMS(2.0%)、NaN3(2×10-3mol/L)则降低了种子的发芽率和活力指数。高浓度的化学诱变剂2.0%EMS和2×10-3mol/LNaN3对芽的抑制效应大于根。与对照相比,经诱变处理后早稻品种种子根长和芽长生长量的变幅大于晚稻品种;说明早稻对化学诱变剂的敏感性强于晚稻。当EMS和NaN3浓度分别高于1.0%、1.0×10-3mol/L时,幼苗地上部(除品种R974外)、地下部的生长均受到抑制,表现为苗高变矮、根长变短,并与对照差异达极显著水平。
Uses different type chemistry mutagens treated the paddy rice seed, The results showed that：with chemistry mutagen processing density increase, The paddy rice seed＇ s germination viability, the germination percentage, the vigor index, root and bud the growth condition and so on basically have a decreasing trend. But low density EMS（0.5% ）, MNU（0.05% ） has＇enhanced the function which to rice seed germination percentages, the germination tendency, the vigor index as well as the promotion late rice seed root and the bud grows; High concentration EMS （ 2.0% ） , NaN3 （ 2 ×10^ - 3 mol/L） reduce the germination percentage and the vigor index of seed. And high concentration chemistry mutagens that 2.0% EMS and 2 × 10 ^-3mol/L NaN3 has more inhibitory effect on bud growth of rice than on its root. The results compared with contrast showed that root longness and seedling high of growth fluctuation was early rice more wide than the late rice after treated with chemical mutagens, and shows early rice more sensitive than the late rice. When EMS and the NaN3 density is higher separately than 1.0 ×10^ -3 mol/L, 2.0% , above ground （ stem and leaf） and under-ground （root） of the paddy rice seedling are suppressed, The exhibition is that the root longness and the seedling high become shortens（ except R 974）, And reaches the significance level compared with contrast.
出处
《种子》
CSCD
北大核心
2008年第3期9-13,共5页
Seed
基金
湖南省教育厅重点课题"优质专用水稻新品种(组合)选育及其基础研究"(项目编号:02A018)
关键词
化学诱变剂
诱变处理
水稻品种
发芽特性
根
芽
chemistry mutagens
mutation treatment
rice variety
germination characteristic
root
bud
作者简介
陈灿（1965-），男，高级实验师，在职博士研究生；主要从事农学实验教学，以及生态农业与作物种子工程研究；E-mail：CC973@126．com．
通讯作者：徐庆国，研究员，博士研究生导师。
