摘要
目的:筛选优质盾叶薯蓣种质资源,探讨卫星搭载对盾叶薯蓣变异效应。方法:利用返回式卫星搭载盾叶薯蓣种子进行空间诱变处理,对空间诱变后的2个居群盾叶薯蓣的种子活力、植株生长、染色体以及薯蓣皂苷元含量进行研究。结果:空间诱变后种子表现为萌发提前,但对种子发芽率影响不明显,出现非整倍体和染色体加倍现象,二年生根状茎鲜重和薯蓣皂苷元含量显著高于对照,但三年生根状茎增重变缓,同时薯蓣皂苷元含量均有不同程度下降。结论:卫星搭载对盾叶薯蓣的种子活力有一定的促进作用,同时改变了染色体结构,二年生根状茎鲜重和薯蓣皂苷元含量显著高于对照,提供了良好的选育材料,但三年生的根状茎鲜重增长变缓,薯蓣皂苷元有下降趋势,有待进一步研究。
Objective： In order to find the new varieties with different horticultural characters, and investigate the mutation effects of seeds of Dioscorea zingerbrensis. Method： The seeds were carried by a satellite into space and recovered. The space mutation effect on the germination, seedling growth, chromosomes and rhizome diosgenin content of SP1 populations of D. zingerbrensis were in- vestigated. Result. Stimulated by space environment, the seed possessed the fast germinating characteristics. Germination rate showed no change. It was also found that a few plants were aneuploid or tetraploid. Fresh rhizome weight and rhizome diosgenin content in the second year plant were remarkably higher than those of the control. However, the increasing of third year plant was slow down, and rhi- zome diosgenin content in the third year plant declined simultaneously. Conclusion： The space environment showed stimulating effects on seed germination, fresh rhizome weight and rhizome diosgenin content.
出处
《中国中药杂志》
CAS
CSCD
北大核心
2009年第14期1773-1777,共5页
China Journal of Chinese Materia Medica
基金
江苏省农业科技攻关项目(BE2001356)
关键词
盾叶薯蓣
空间诱变
变异
薯蓣皂苷元
Dioscorea zingerbrensis
space mutation
variation
diosgenin
