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Cadmium(Cd)is a toxic heavy metal for both plants and animals.Rice,an important staple food for nearly a half of the worlds population,is a major source of Cd intake.Intake of Cd from Cd-contaminated rice causes Itai-Itai disease,which is a major health concern worldwide.Therefore,it is a very important issue to limit Cd into the food chain from soil to reduce potential health risks to humans.