| Cd对油菜种子发芽与幼苗生长的生态毒性 |
| |
| 引用本文： | 王兴明,李晶,涂俊芳,黄永杰,刘登义.Cd对油菜种子发芽与幼苗生长的生态毒性[J].土壤通报,2006,37(6):1218-1223. |
| |
| 作者姓名： | 王兴明 李晶 涂俊芳 黄永杰 刘登义 |
| |
| 作者单位： | 安徽师范大学,生物多样性研究中心,安徽,芜湖,241000;安徽师范大学,重要生物资源保护与利用安徽省重点实验室,安徽,芜湖,241000 |
| |
| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金 |
| |
| 摘 要： | 通过水培实验研究了Cd胁迫下,油菜种子发芽及幼苗生长状况。结果表明:Cd胁迫下,发芽率、发芽势、发芽指数以5 mg L-1Cd浓度为阈值呈现低促高抑现象,发芽指数与Cd浓度曲线相关性好于发芽率和发芽势;活力指数、总长、芽长、根长、总重、芽重、根重表现为单抑现象。Cd对根生长抑制作用大于芽,逐步回归发现,Cd主要通过抑制根生长达到对幼苗生长抑制。种子电解质外渗率和根细胞有丝分裂指数分别与Cd浓度成极显著相关,相关系数分别为0.603**和-0.571**。因子分析发现,根长较其它指标对Cd敏感,可用于Cd污染的监测指标。
|
| 关 键 词： | 种子发芽 根长 生态毒性 |
| 文章编号： | 0564-3945(2006)06-1218-06 |
| 修稿时间： | 2005年10月9日 |
Eco -toxicity of Cd on the Seed Germination and Seedling Growth of Rape |
| |
| WANG Xing-ming,LI Jing,TU Jun-fang,HUANG Yong-jie,LIU Deng-yi.Eco -toxicity of Cd on the Seed Germination and Seedling Growth of Rape[J].Chinese Journal of Soil Science,2006,37(6):1218-1223. |
| |
| Authors: | WANG Xing-ming LI Jing TU Jun-fang HUANG Yong-jie LIU Deng-yi |
| |
| Abstract: | Through water cultivation,the seed germination and seedling growth of rape treated with Cd were studied.The results showed that seed germination rate,germination viability and germination index have different effects,being promotion bove 5 mg L~(-1) but inhibition below 5 mg L~(-1) when treated with Cd.The curve estimation showed that the correlation between germination index and Cd concentration was superior to that between germination rate,orgermination viability and Cd concentration,respectively.The vigour index,total length,bud length,root length,total weight,bud weight,and root weight were all inhibited by Cd addition.The growth of root was inhibited stronger than that of bud.The stepwise regression showed that the inhibition of seedling resulted from the inhibition of root.The conductance of the rape seed and the mitosis of the rape cells in seedling roots were correlated significantly with Cd concentration(0.603~(**) and-0.571~(**),respectively).The factor analysis indicated that root length was more sensitive than the other indexes.Therefore,root length could be perfectly used to monitoring Cd pollution. |
| |
| Keywords: | Seed germination Root length Eco-toxicology |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
