RICE SCIENCE ›› 2009, Vol. 16 ›› Issue (2): 151-156 .DOI: 10.1016/S1672-6308(08)60072-4

• Research Paper • Previous Articles     Next Articles

Influences of Cadmium on Grain Mineral Nutrient Contents of Two Rice Genotypes Differing in Grain Cadmium Accumulation

Cheng Wang-da1; Yao Hai-gen1; Zhang Hong-mei1; Tao Xian-guo2   

  1. 1 Jiaxing Academy of Agricultural Sciences, Jiaxing 314016, China; 2 Agricultural Bureau of Xiuzhou District, Jiaxing 314001, China
  • Received:2008-07-11 Online:2009-06-28 Published:2009-06-28
  • Contact: Cheng Wang-da
  • Supported by:
    the Postdoctoral Science Foundation of China (Grant No. 2005037824), the Science and Technology Department of Zhejiang Province, China (Grant No. 2005C32007), the Science and Technology Bureau of Jiaxing, Zhejiang, China (Grant No. 2006AZ1008-1 and No. 2008AZ2027) for financial support.

Abstract: A pot experiment was conducted to study the effects of Cd on grain Cd, K, P, Mg, Zn, Cu, Pb, Fe and Mn accumulation in two rice genotypes (Xiushui 63 and Xiushui 217) differing in grain Cd accumulation under four Cd levels, i.e. 0, 0.5, 2.5 and 12.5 mg/kg. Rice genotype greatly affected the grain K content, but not significantly for P, Mg, Zn, Cu, Pb, Fe and Mn contents. There were remarkable effects of additional Cd on the contents of P, Mg and Zn in grains, while not significant for K, Cu, Pb, Fe and Mn contents. No significant differences were found in the interaction of genotype by additional Cd on these nine element contents. The low grain Cd accumulation genotype Xiushui 217 had significantly higher grain K, Mg, Cu and Mn contents than the high grain Cd accumulation genotype Xiushui 63, but the case was opposite for Zn, Pb and Fe contents. It also showed that Cd addition levels significantly influenced the K, P, Mg, Zn, Cu, Pb, Fe and Mn contents in rice grains. Grain K, P, Mg, Zn, Fe and Mn contents reduced with the increasing rate of Cd addition.

Key words: rice, Oryza sativa, cadmium, mineral nutrients, genotype