| Cd、Pb对银杏根系离子微域分布影响研究 |
| |
| 引用本文： | 朱宇林,曹福亮,汪贵斌,谭萍.Cd、Pb对银杏根系离子微域分布影响研究[J].江西农业大学学报,2010,32(2). |
| |
| 作者姓名： | 朱宇林 曹福亮 汪贵斌 谭萍 |
| |
| 作者单位： | 1. 玉林师范学院,广西,玉林,537000
2. 南京林业大学,森林资源与环境学院,江苏,南京,210037 |
| |
| 基金项目： | 江苏省高科技项目(BG2004314) |
| |
| 摘 要： | 为阐明重金属在银杏(Ginkgo biloba L.)根尖微区中的富积特性及对其它选择性吸收离子的作用机理,采用X线电子探针技术研究Cd、Pb对银杏根系中离子微域分布的影响。结果表明,Cd、Pb处理后在表皮、皮层、韧皮部和木质部细胞中均可发现Cd2+、Pb2+的积累。Cd、Pb胁迫显著地影响了根系微区的离子分布,使细胞中大多离子的稳态受到破坏,是Cd、Pb对植物产生毒害的机制之一。同时Ca2+和K+在根系微区不同组织中均呈现出较强的峰,Ca2+和K+稳态的维持显示银杏对Cd、Pb胁迫可能具有较强的耐性机制。
|
| 关 键 词： | 银杏 Cd Pb X线电子探针 离子微域分布 |
Effects of Cd and Pb Stress on the Micro-distribution Analysis of the Across Sections of Ginkgo Root |
| |
| ZHU Yu-lin,CAO Fu-liang,WANG Gui-bin,TAN Ping.Effects of Cd and Pb Stress on the Micro-distribution Analysis of the Across Sections of Ginkgo Root[J].Acta Agriculturae Universitis Jiangxiensis,2010,32(2). |
| |
| Authors: | ZHU Yu-lin CAO Fu-liang WANG Gui-bin TAN Ping |
| |
| Institution: | 1.Yulin Normal University/a>;Yulin 537000/a>;China/a>;2.College of Forest Resources and Environment/a>;Nanjing Forestry University/a>;Nanjing 210037/a>;China |
| |
| Abstract: | In order to elucidate deeply and systematically the toxicity and tolerance mechanisms of Ginkgo to heavy metals stress,the micro-distribution analysis of the across sections of Ginkgo root with X-ray microanalysis was studied under cadmium and lead stress.The micro-distribution analysis of the across sections of Ginkgo root with X-ray microanalysis indicated that ion micro-distribution of root was significantly affected by cadmium and lead single and combined pollution.Cd2+ and Pb2+ accumulation in the epid... |
| |
| Keywords: | Ginkgo biloba L Cd Pb X-ray electron probe microanalysis ion micro-distribution |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
