摘要
以波斯菊种子为实验材料,用不同浓度的Pb(NO 3)2溶液(0,50,100,200,400 mg/L)对波斯菊种子进行处理,研究不同铅浓度对波斯菊种子萌发及幼苗生长影响情况.结果表明:较低质量浓度的Pb^2+处理提高了波斯菊种子的发芽率、发芽势及发芽指数,当Pb^2+质量浓度为100 mg/L时促进作用最强烈;当Pb^2+浓度大于100 mg/L时,Pb^2+的促进作用开始慢慢减小;Pb^2+处理对波斯菊幼苗的根长、苗高以及鲜重有明显抑制作用.总体来说,波斯菊种子对Pb^2+的耐受性较强.
The seed germination and seedling growth of Cosmos bipinnatus were studied by using Pb(NO3)2 solution at different concentrations(0,50,100,200,400 mg/L).The results showed that under the treatment of low Pb^2+,the germination rate,germination potential and germination index of Cosmos bipinnatus were enhanced,and the promoting effect was strongest when the Pb^2+ concentration was 100mg/L.When the concentration of Pb^2+ was larger than 100mg/L,the promoting effect of Pb^2+ gradually decreased.The effect of different concentration of Pb^2+ had significant effect on root length,seedling height and fresh quality.The seed tolerance of Cosmos bipinnatus to Pb^2+was strong.
作者
范志强
张士儒
孟书琴
程玉
朱锡红
FAN Zhiqiang;ZHANG Shiru;MENG Shuqin;CHENG Yu;ZHU Xihong(School of Life Sciences,Anqing Normal University,Anqing,Anhui 246133)
出处
《绵阳师范学院学报》
2019年第11期53-56,66,共5页
Journal of Mianyang Teachers＇ College
基金
安徽省大学生创新创业计划项目(2018103720086)
安徽省教育厅自然基金项目(KJ2009B013)
关键词
重金属铅
波斯菊种子
种子萌发
幼苗生长
heavy metal Pb
Cosmos bipinnatus Cav.
seed germination
seedling growth
