In this study, element concentrations in grains of three wild rice species (i.e., Oryza rufipogon, Oryza officinalis and Oryza meyeriana) and three cultivated rice varieties (i.e., Nipponbare, 93-11 and HY-8) as well as in leaves of Oryza officinalis and its introgression lines were measured. The wild rice species were highly useful in terms of the quality and the harmful heavy metal resistance. The results showed that the mean concentrations of heavy metals in the soil was in the ranking order of Ti > Zr > Sr > Pb > Rb > As. The essential element concentrations, it was found that the
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