| 镉超富集苋菜品种（Amaranthus mangostanus L.）的筛选 |
| |
| 引用本文： | 范洪黎,周卫.镉超富集苋菜品种（Amaranthus mangostanus L.）的筛选[J].中国农业科学,2009,42(4):1316-1324. |
| |
| 作者姓名： | 范洪黎 周卫 |
| |
| 作者单位： | 中国农业科学院农业资源与农业区划研究所/农业部作物营养与施肥重点实验室,北京,100081 |
| |
| 基金项目： | 国家重点基础研究发展规划(973计划) |
| |
| 摘 要： | 【目的】苋菜在中国的分布很广，品种资源丰富。通过筛选耐镉苋菜品种，发掘镉污染土壤植物修复资源。【方法】采用溶液培养方法，从来自不同生态区域的23个苋菜品种（Amaranthus mangostanus L.）中筛选出具有镉超富集能力的品种;采用赤红壤、黄棕壤、菜园土进行盆栽试验，研究苋菜在土壤Cd浓度分别为5、10、25 mg?kg-1时，对镉污染土壤的修复潜力。【结果】在溶液Cd浓度3 mg?L-1条件下培养，苋菜品种天星米地上部镉含量高达260 mg?kg-1。在土壤Cd浓度 25 mg?kg-1条件下，苋菜天星米地上部镉浓度高达212 mg?kg-1，富集系数达到8.5，地上部净化率达3.8%，各镉处理水平总生物量以及地上部生物量均未显著降低。【结论】苋菜天星米基本具备了镉超富集植物的特征，可用于镉污染土壤的生物修复。
|
| 关 键 词： | 苋菜 镉 超富集 生物修复 |
| 收稿时间： | 2008-5-23 |
Screening of Amaranth Cultivars(Amaranthus mangostanus L.)for Cadmium Hyperaccumulation |
| |
| FAN Hong-li,ZHOU Wei.Screening of Amaranth Cultivars(Amaranthus mangostanus L.)for Cadmium Hyperaccumulation[J].Scientia Agricultura Sinica,2009,42(4):1316-1324. |
| |
| Authors: | FAN Hong-li ZHOU Wei |
| |
| Institution: | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences/Ministry of Agriculture Key Laboratory of Crop Nutrition and Fertilization
|
| |
| Abstract: | 【Objective】 Amaranth (Amaranthus mangostanus L.) is widely distributed in China and China has abundant varieties, it can be served as a candidate of cadmium hyperaccumulators for phytoremediation by screening of amaranth cultivars which is tolerant to cadmium. 【Method】 To obtain cadmium hyper-accumulator, Cd uptake in 23 amaranth cultivars from different ecological regions was investigated under hydroponic culture condition. Meanwhile, a pot experiment was established to probe phytoremediation potentiality of Cd contaminated soil by amaranth. Three treatments (Cd 5, 10 and 25 mg?kg-1) were conducted using to red soil, yellow brown soil and vegetable soil. 【Result】 The results showed that under hydroponic culture with Cd 3 mg?L-1, the cadmium concentration in the shoots of the cultivar Tianxingmi reached 260 mg?kg-1, and its total cadmium uptake was the highest among various cultivars. In the treatment of Cd 25 mg?kg-1, the cadmium concentration in the shoots of the cultivar Tianxingmi reached 212 mg?kg-1, while the bioaccumulation factor and shoot purification rate reached 8.50 and 3.8%, respectively. Further, the total biomass and shoot biomass were not decreased significantly in all Cd treatments. 【Conclusion】 These results suggested that cultivar Tianxingmi is a typical Cd hyperaccumulator, and can be used in phytoremediation of Cd contaminated soil. |
| |
| Keywords: | amaranth cadmium hyperaccumulation phytoremediation |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《中国农业科学》浏览原始摘要信息 |
| 点击此处可从《中国农业科学》下载免费的PDF全文 |
|
