Cadmium uptake by different rice genotypes that produce white or dark grains
  • 【DOI】

    10.3321/j.issn:1001-0742.2004.06.018

  • 【摘要】

    A pot experiment was conducted to investigate cadmium(Cd) uptake by different rice cultivars that produce white or dark grains. Four cultivars with white grains(hereafter, white rice) and five cultiva... 展开>>A pot experiment was conducted to investigate cadmium(Cd) uptake by different rice cultivars that produce white or dark grains. Four cultivars with white grains(hereafter, white rice) and five cultivars with dark colors (hereafter dark rice) were selected for this experiment. Three levels of soil Cd concentrations were used, background(0), 5 and 10 mg/kg. After harvest, plant biomass, tissue concentrations of Cd, Ca, Fe, Cu and Zn were analyzed. The results showed that Cd concentrations are significant different between different genotypes, but when comparing the Cd concentrations for the two groups, no significant difference was found. For other divalent cations, Ca concentrations in dark rice were higher than those in white ones(P<0.001 for shoots, P = 0.037 for roots); Fe concentrations in dark rice were also higher than those in white ones(P = 0.001 either in shoot or root); Zn concentrations in shoot of dark rice were higher than those in white ones, but no significant difference in roots. The total molar concentrations of divalent cations in dark rice were also significantly higher than in white rice. The potential benefit of higher Ca and Fe concentrations in dark rice and similar Cd concentrations in both groups is also discussed in this paper. 收起<<

  • 【作者】

  • 【作者单位】

    Research Center for Eco-environmental Sciences/Research Center for Eco-environmental Sciences/Soil and Land Systems

  • 【刊期】

    环境科学学报(英文版) ISTIC SCI 2004年6期

  • 【关键词】

    cadmium  nutrient deficiency  plant nutrition  rice  dark grain  soil contamination 

  • 【基金项目】

    国家自然科学基金 中国科学院资助项目