| 小麦根际铅、镉的生态效应 |
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| 引用本文： | 林琦,陈英旭,陈怀满,郑春荣.小麦根际铅、镉的生态效应[J].生态学报,2000,20(4):634-638. |
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| 作者姓名： | 林琦 陈英旭 陈怀满 郑春荣 |
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| 作者单位： | 1. 浙江大学华家池校区环境保护系,杭州,310029
2. 中国科学院南京土壤研究所,南京,210008 |
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| 基金项目： | 国家自然科学基金，省自然科学基金资助项目 |
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| 摘 要： | 通过水培试验研究小麦根际铅镉的生态效应，研究培养介质于铅、镉胁迫，介质ＰＨ校较照发生变化，铅处理使介质ＰＨ上升，面的是铅处理介质ＰＨ还是下降，只是较对照变化缓慢，铅、镉胁迫根必出糖类含量增高，且铅－交互作用对糖泌了的影响也达到显著水平。根系形貌照相观察及电子探铁能是表明，铅、镉对根系的毒害机制可能不同。
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| 关 键 词： | 铅 镉 糖泌出 能谱分析 根限效应 毒害机理 PH值 |
| 收稿时间： | 1998/4/30 0:00:00 |
| 修稿时间： | 1999/4/12 0:00:00 |
The ecological effects of Pb and Cd on the root activities of wheat |
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| LIN Qi,CHEN Yingxu,CHEN Huaiman and ZHENG Chunrong.The ecological effects of Pb and Cd on the root activities of wheat[J].Acta Ecologica Sinica,2000,20(4):634-638. |
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| Authors: | LIN Qi CHEN Yingxu CHEN Huaiman and ZHENG Chunrong |
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| Abstract: | Effect of Pb,Cd on wheat was studied using hydroponic experiments.The results showed that root activities,i.e.the release of proton,exudate of sugar,were related to the contents of Pb,Cd.The pH in the growth medium increased with the increasing concentration of Pb,and decreased with the increasing concentration of Cd in solution.The quantity of sugar exudate increased with Pb,Cd increase and was affected distinctively by Pb\|Cd interaction.The changes in the distribution patterns of Cd and Pb were also studied using an electron probe X\|ray microanalyzer.The content of Cd was lower in the stelbe than that in the cortex. |
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| Keywords: | Pb Cd variations of pH exudate of sugar X-ray microanalysis |
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