| 刘登彪,蒋成爱,张嘉慧,赵 涛.不同硼浓度对三种超富集植物吸收硼及重金属的影响[J].农业环境科学学报,2014,33(6):1106-1111. |
| 不同硼浓度对三种超富集植物吸收硼及重金属的影响 |
| Effects of Boron Concentrations on Uptake of Boron and Heavy Metals by Three Hyperaccumulators |
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| DOI：10.11654/jaes.2014.06.008 |
| 中文关键词: 硼 超富集植物 锌 镍 |
| 英文关键词: boron hyperaccumulator zinc nickel |
| 基金项目: |
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| 摘要点击次数: 1894 |
| 全文下载次数: 2575 |
| 中文摘要: |
| 通过水培试验研究了0~15 mg·L-1的硼（B）对Zn/Cd 超富集植物东南景天（Sedum alfredii）、Zn/Cd/Ni超富集植物遏蓝菜（Noccaea caerulescens）和Ni超富集植物庭荠属（Alyssum murale）在20 mg Zn·L-1及18 mg Ni·L-1胁迫下生长和吸收重金属的影响。试验结果显示：较低浓度的硼促进三种超富集植物的生长和重金属吸收，而高浓度的硼则表现出抑制作用；三种植物在硼处理浓度为10.0 mg·L-1时都开始表现中毒的症状，三种植物地上部分的硼含量随硼处理浓度的增加而增大，S.alfredii叶部、N.caerulescens、A.murale地上部分的硼浓度范围分别为40.2~880、115~744、156~922 mg·kg-1 干重；当硼处理的浓度为2.0、0.5 mg·L-1时，S.alfredii和N.caerulescens地上部分的重金属吸收达最大值，A.murale地上部Zn和Ni的含量则分别在硼处理浓度为2.0、5 mg·L-1时达到最大。 |
| 英文摘要: |
| Boron（B） is an essential micronutrient for the growth of higher plants. This research was aimed to investigate the effects of different concentrations of boron（0~15 mg B·L-1） on the growth of and B, Zn and Ni uptake by Zn/Cd hyperaccumulator Sedum alfredii, Zn/Cd/Ni hyperaccumulator Noccaea caerulescens and Ni hyperaccumulator Alyssum murale. The growth and metal uptake of three hyperaccumulators were enhanced by B at low concentrations in the nutrient solution, but inhibited at higher concentrations. These hyperaccumulators showed toxic symptoms at B concentrations greater than 10.0 mg B·L-1. The accumulation of B in the shoots of three hyperaccumulators increased with increasing solution B concentrations. It ranged from 40.2~880 mg·kg-1, 115~744 mg·kg-1, and 156~922 mg·kg-1（in dry weight） for S. alfredii leaves, N.caerulescens shoots and A. murale shoots, respectively. Metal accumulations in the shoots of S. alfredii and N. caerulescens were greatest, respectively, at 2.0 mg B·L-1 and 0.5 mg B·L-1 of solution B concentrations. Alyssum murale accumulated greatest Zn and Ni in the shoots at 2.0 mg B·L-1 and 5.0 mg B·L-1, respectively. |
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