许恒 1赵雪花 1郑婉露 1李德贵 1张丹丹 2张子呈 2李翔3
作者信息
- 1. 六盘水市林业局 六盘水 553001
- 2. 黑龙江省原子能研究院 哈尔滨 150081
- 3. 宁夏大学林业与草业学院 银川 750021||林木资源高效生产全国重点实验室 银川 750021
- 折叠
摘要
Abstract
The seeds of wild Idesia polycarpa obtained from Liupanshui City,Guizhou Province were used as experimental materials in this study,where the seeds were treated with different irradiation doses of 60Co-γ ray.The effect of 60Co-γ ray irradiation on the seedling rate,ground diameter,seedling height,leaf length,leaf width,leaf area,leaf circumference,secondary root length,secondary root diameter,and chlorophyll content of 1-year-old I.polycarpa were investigated.The results showed that compared with the control,60Co-γ irradiation treatment significantly increased the seedling rate of I.polycarpa and had significant effects on the growth of I.polycarpa seedlings(p<0.05).Under an irradiation dose of 120 Gy,the ground diameter and seedling height of the I.polycarpa seedlings were the largest,i.e.,36%and 68%higher than those of the control,respectively.With the increase in irradiation dose,the length of secondary roots,the thickness of secondary roots,and the number of tertiary roots increased significantly,reaching maximum values at 120 Gy.The chlorophyll content of I.polycarpa leaves first increased,then decreased,and then increased again.Mutant plants with high growth,stem bending,deformity,multi-branching,and dwarfing were produced via 60Co-γ ray irradiation.The irradiation dose of 60Co-γ ray was significantly correlated with most of the growth traits(p<0.05).The results above show that 60Co-γ ray irradiation can improve the seedling emergence rate of I.polycarpa,promote the growth and root development of I.polycarpa,and yield a few different types of mutant plants,thus providing an important theoretical basis for the creation of new germplasms of I.polycarpa.关键词
山桐子/60Co-γ射线/出苗率/幼苗生长/叶绿素Key words
Idesia polycarpa/60Co-γ ray/Emergence rate/Seedling growth/Chlorophyll分类
能源科技
