期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
难溶态锌、镉对香根草抗氧化酶活性及锌、镉吸收的影响 被引量:7
1
作者 李文一 徐卫红 +1 位作者 何建平 熊治廷 《水土保持学报》 CSCD 北大核心 2009年第1期122-126,共5页
采用土培根袋试验,研究了难溶态锌、镉对香根草生长、抗氧化酶活性、MDA含量及锌、镉吸收累积的影响。结果表明,锌、镉均不同程度抑制了香根草的生长,抑制作用均以锌镉交互>镉>锌。以锌、镉复合污染更加剧了对植物的胁迫。不同生... 采用土培根袋试验,研究了难溶态锌、镉对香根草生长、抗氧化酶活性、MDA含量及锌、镉吸收累积的影响。结果表明,锌、镉均不同程度抑制了香根草的生长,抑制作用均以锌镉交互>镉>锌。以锌、镉复合污染更加剧了对植物的胁迫。不同生长期(75 d和90 d)锌镉处理的香根草地上部和根系的SOD、POD、CAT活性及MDA含量均显著增加,且随重金属毒性增强,酶活性和MDA含量亦增加。香根草根系膜脂过氧化的程度大于地上部。香根草体内锌镉含量以地上部<根系,但吸收的锌主要富集在地上部,吸收的镉则主要富集在根系,且随着生长期的延长,各锌镉处理的锌镉积累量明显增加。 展开更多
关键词 难溶态锌、 抗氧化酶 MDA 锌、镉吸收 香根草
下载PDF
Growth Response and Metal Accumulation of Sedum alfredii to Cd/Zn Complex-Polluted Ion Levels 被引量:22
2
作者 叶海波 杨肖娥 +2 位作者 何冰 龙新宪 石伟勇 《Acta Botanica Sinica》 CSCD 2003年第9期1030-1036,共7页
Sedum alfredii Hance has been identified as a new Zn-hyperaccumulator native to China. In this study, responses and metal accumulation of S alfredii were examined under Zn/Cd complex polluted conditions. The results s... Sedum alfredii Hance has been identified as a new Zn-hyperaccumulator native to China. In this study, responses and metal accumulation of S alfredii were examined under Zn/Cd complex polluted conditions. The results showed that optimal growth of S alfredii in terms of the maximum dry matter yield was observed at Zn/Cd complex level of 500/100 mumol/L. Plant cadmium (Cd) or zinc (Zn) concentrations increased with increasing Cd or Zn supply. During the 20 d treatment, the highest Cd concentration in the leaves reached 12.1 g/kg at Zn/Cd level of 50/400 mumol/L and that of Zn in the stems was 23.2 g/kg at Zn/Cd level of 1000/50 mumol/L. The distribution of Cd in different plant parts decreased in the order: leaf > stem greater than or equal to root, whereas that of Zn was: stem > leaf greater than or equal to root. The accumulation of Cd and Zn in the shoots and roots of S. alfredii increased with the increasing of Zn/Cd supply levels, peaked at Zn/Cd levels of 250/400 and 500/100 mumol/L, respectively. The highest Cd and Zn uptake by the shoots was approximately 5 and 11 mg/plant, and was over 20 and 10 times higher than those in the roots, respectively. Zn supply at levels less than or equal to 500 mumol/L increased plant Cd concentrations, whereas high Zn supply decreased root Cd but did not affect leaf Cd concentrations in S alfredii Low Cd supply increased Zn concentration in the leaves, but Cd supply higher than 50 mumol/L considerably reduced root Zn concentrations, especially at low Zn level. These results indicate that S. alfredii can tolerate high Zn/Cd complex levels and has an extraordinary ability to hyperaccumulate not only Zn but also Cd. It could provide a new valuable plant material for understanding the mechanisms responsible for co-hyperaccumulation of Zn and Cd as well as for phytoremediation of the Cd/Zn complex polluted soils. 展开更多
关键词 complex pollution cadmium (Cd) zinc (Zn) HYPERACCUMULATION Sedum alfredii
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部