期刊论文

Accumulation,Subcellular Distribution and Chemical Forms of Cadmium in Aquatic Plants

中文

西北植物学报

1000-4025

2018

38

4

682-689

10.7606/j.issn.1000-4025.2018.04.0682

国家自然科学基金（4121511） 湖南省自然科学基金（08JJ6018） 湖南省教育厅青年基金（12B059）

本校为第一机构

以7种水生植物(长苞香蒲、水生美人蕉、黑藻、粉绿狐尾藻、花叶芦竹、香根鸢尾、水葫芦)为研究材料,构建生物塘系统,通过差速离心法和五步提取法,提取植物各亚细胞组分和不同化学形态的镉,并用原子吸收分光光度法测定镉含量,分析镉在水生植物体中富集特征,揭示植物对镉的耐性机制。结果表明:(1)水生植物根中镉富集量大于茎和叶;3种类型水生植物富集镉能力表现为沉水植物(粉绿狐尾藻、黑藻)>浮水植物(水葫芦)>挺水植物(长苞香蒲、水生美人蕉、花叶芦竹、香根鸢尾)。(2)镉在黑藻、水葫芦和花叶芦竹中的亚细胞分布量均呈现为细胞壁>可溶组分>原生质体>线粒体,所占比例分别为37.16%~50.86%、20.69%~...

A biological pond system was constructed by Typha angustata,Canna glauca,Hydrilla verti cillata,Myriophyllum aquaticum,Arundo donax,Iris tectorum,Eichhornia crassipes to investigate the accumulation and tolerance of cadmium in aquatic plants.The subcellular components and different chemi cal forms of cadmium in plants was separated by differential centrifugations and five-step extraction.Then,the cadmium content was determined by atomic absorption spectrophotometry.The results showed that:(1) the cadmium accumulation was much more in root than ...