外源钾对铜胁迫三叶草种子萌发与幼苗生长的影响  

Effects of Kalium Application on the Germination and Seedling Growth of the Trifolium Pratense Under Cu Polluted

作　　者：陈雪梅[1] 姚婧[1] 王友保[1] 安雷[1] 刘登义[1] 

机构地区：[1]安徽师范大学生命科学学院,安徽芜湖241000

出　　处：《安徽师范大学学报（自然科学版）》2008年第5期464-468,共5页Journal of Anhui Normal University(Natural Science)

基　　金：国家自然科学基金(30470270);安徽省教育厅自然科学基金重点项目(2006KJ059A);安徽省高校生物环境与生态安全省级重点实验室基金;重要生物资源与利用研究安徽省重点实验室基金;安徽省高校骨干教师基金

摘　　要：通过水培实验研究了铜钾复合和铜单一处理分别对三叶草种子萌发活力和幼苗生长的影响.结果表明,在本实验条件下,0.076%的钾能明显提高铜胁迫下的三叶草种子萌发率,并能促进幼苗的生长,使其生物量、光合色素含量显著增加,同时幼苗叶片细胞膜透性极显著下降.揭示了营养元素钾对三叶草的铜毒害有缓解作用,为三叶草的进一步开发和利用提供实验参考依据.从植物修复角度来说,利用增钾手段提高耐性植物三叶草生物量并增加其抗性具有重要的应用价值.A solution-culture experiment was carried out to explore effects of Cu and Kalium compound and Cu sole processing separately on the germination vigor and seedling growth of the Trifolium pratense. The results showed that under the condition of this experiment, K with 0. 076 % concentration could increase significantly burgeoning rate of the Trifolium pratense seed intimidated with Cu, promoted seedling growth, including the biomass and photosynthetic pigments content. At the same time, the cell membrane permeability of seedling leaves is very remarkably reduced. It indicates that the nutrition element K could mitigate the toxicity of Cu. This is particularly important referrence proof about experiment of more exploiting fully the Trifolium pratense. With the respect to phytoremediation, the application of K at appropriate rates may be a useful approach to enhance the biomass and fastness of Trifolium pratense with Cu contaminated.

关 键 词：铜 K 三叶草 种子萌发 幼苗生长 生物量 

分 类 号：S565.101[农业科学—作物学]