Notice of RetractionUptake and Distribution of Cadmium in Different Rice Cultivars

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

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To investigate the variations between rice cultivars in cadmium (Cd) uptake and distribution, pot soil experiments were conducted with two rice cultivars of different genotypes at different soil Cd levels, i.e. 0 (the control), 10, 50 mg kg^-1. The results showed that Cd concentrations and accumulations in the plants of Shanyou 63 (genotype indica) were generally higher than those of Wuyunjing 7 (genotype japonica), but the magnitudes of the differences between two rice cultivars differed greatly with soil Cd levels, plant organs and plant growth stages. Among different soil Cd levels, the magnitudes of the differences were the largest under soil Cd treatment of 10 mg kg^-1. Concerning different parts of rice plants, the magnitudes of the differences were the highest in the grains. Most of Cd absorbed by rice plants accumulated in roots (From about 75% to about 94%), and only a very small portion of Cd was transferred into grains (less than 1%). The differences between the rice cultivars in Cd distribution were also the largest under soil Cd treatment of 10 mg kg^-1, and in the grains. The results showed that the rice cultivar Shanyou 63 had higher abilities to absorb Cd from Cd-contaminated soil and transferred a larger proportion to aboveground parts and grain than the cultivar Wuyunjing 7, especially in relatively low levels of soil Cd contamination (for example, 10 mg kg^-1). The results indicate that Cd concentration in rice grain is governed by plant Cd uptake and the- transport of Cd from root to shoot, and may be in a greater extent, by the transport of Cd from shoot to grain.