MeV离子辐照拟南芥的萌发规律研究  

Germination of Arabidopsis thaliana seeds irradiated by MeV ions

作　　者：覃怀莉[1] 薛建明[1] 赖江南[1] 张伟明[1] 王建勇[1] 颜莎[1] 赵渭江[1] 王宇钢[1] 

机构地区：[1]北京大学重离子物理教育部重点实验室,北京1000871

出　　处：《核技术》2005年第9期675-677,共3页Nuclear Techniques

基　　金：博士点基金(20030001085);国家自然基金(10435020)资助

摘　　要：利用不同能量的F离子和H离子分别辐照拟南芥干种子,通过种子发芽率实验研究了低能离子生物效应与离子种类、离子能量和辐照注量之间的关系。实验结果表明,H离子的辐照效率高于F离子;F离子辐照的种子发芽率曲线,随F离子注量的增加,均呈现先下降后升高再下降的马鞍曲线形状,达到马鞍峰值需要的注量随离子能量的增加而减少。文中对上述现象的可能机理进行了讨论。Dry seeds ofArabidopsis thaliana were irradiated with F ions and H ions with the energy range from keV to MeV, respectively. The inhibition of germination was investigated to display the influences of ion mass, energy and fluence. The results show that H ion irradiation is more effective in decreasing the germination rate than heavier F ion irradiation. After irradiation of F ions, a decrease-increase-decease type of germination rate-fluence response curve was found and the ion fluence at the peak position decreases with ion energy increase. The possible mechanism of above experimental results is discussed in this paper.

关 键 词：离子辐照 拟南芥 发芽率 

分 类 号：Q691[生物学—生物物理学]