期刊论文

Zhao, Y.

中文

环境科学学报

0253-2468

2012

32

6

1473-1480

10.13671/j.hjkxxb.2012.06.031

国家自然科学基金（No.30970551）； 环保部公益性行业科研专项（No.201009022）； 湖南省科技计划重点项目（No.2010SK2004）； 湖南省自然科学基金（No.11JJ5022）~~；

本校为第一且通讯机构

以洞庭湖湿地新发现的Cd高富集植物——蒌蒿(Artemisia selengensis)为试验材料,采用盆栽方式,系统研究了蒌蒿在生长期内对Cd的性状反应及富集特征.结果表明,大于40mg.kg~(-1)的Cd胁迫对蒌蒿叶片伤害明显,且导致生物量下降,但植株在100mg.kg~(-1)胁迫下可完成生活史,对Cd有较强的耐受能力;土壤中有效态Cd的含量仅占土壤全Cd含量的15.3%~37.1%;相同胁迫浓度下,各生长阶段的植株体内Cd含量差别不大,但由于生物量的原因,幼苗期对Cd的提取量显著小于其他时期,其中40~60mg.kg~(-1)的Cd处理可使蒌蒿地上部分Cd含量达492~588mg.kg~(-1)(成株期),且植株对该浓度范围的Cd污染去除效果最好;蒌蒿可作为对湿...

Artemisia selengensis grown in Dongting Lake wetland was recently found as a plant with good capacity in enriching Cd. A pot experiment was conducted to study the biological traits and the Cd accumulation characteristics of Artemisia selengensis to Cd stress during its growth period. The final results showed that the leaves were injured apparently in response to significant decrease of above - ground biomass when Cd concentrations in soil were higher than 40 mg.kg^-1. Artemisia selengensis could complete its life cycle at a high Cd concentratio...