%0 Journal Article
%T Combined toxicity of copper and cadmium to six rice genotypes (Oryza sativa L.)<br>Combined toxicity of copper and cadmium to six rice genotypes （Oryza sativa L.）
%A HUANG Yizong
%A HU Ying
%A LIU Yunxia
%A <br>HUANG Yizong
%A HU Ying
%A LIU Yunxia
%J 环境科学学报(英文版)
%D 2009
%I 
%X Accumulation of copper (Cu) and cadmium (Cd) in six rice cultivars (94D-22, 94D-54, 94D-64, Gui630, YY-1 and KY1360) was evaluated through exposure to heavy metal contamination (100 mg/kg Cu, 1.0 mg/kg Cd, and 100 mg/kg Cu + 1.0 mg/kg Cd) in a greenhouse. The dry weight of shoot and root, concentrations of Cu and Cd in plant tissues and the Cu, Cd, P, Fe concentrations in the root surface iron plaques were analyzed eight weeks later after treatment. The results indicated that the plant biomass was mainly determined by rice genotypes, not Cu and Cd content in soil. Separated treatment with Cu/Cd increased each metal level in shoot, root and iron plaques. Soil Cu enhanced Cd accumulation in tissues. In contrast, Cu concentrations in shoot and root was unaffected by soil Cd. Compared to single metal contamination, combined treatment increased Cd content by 110.6%, 77.0% and 45.2% in shoot, and by 112.7%, 51.2% and 18.4% in root for Gui630, YY-1 and KY1360, respectively. The content level of Cu or Cd in root surface iron plaques was not affected by their soil content. Cu promoted Fe accumulation in iron plaques, while Cd has no effect on P and Fe accumulation in it. The translocation of Cu and Cd from iron plaques to root and shoot was also discussed. These results might be beneficial in selecting cultivars with low heavy metal accumulation and designing strategies for soil bioremediation.
%K Cu
%K Cd
%K combined contamination
%K soil
%K uptake
%K accumulation
%K root surface iron plaques<br>水稻基因型
%K 土壤铜
%K 镉含量
%K 联合毒性
%K 重金属污染
%K 植物组织
%K 铁浓度
%K 综合治疗
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=56E44559AD067AD30D1F9EFA6B1D11F8&yid=DE12191FBD62783C&vid=659D3B06EBF534A7&iid=94C357A881DFC066&sid=AEE2F90BC0DB5F35&eid=E4BEEBB9A80BC67E&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=2&reference_num=39