In polluted soils, Cd is generally present as free ions or different soluble forms, and its mobility depends on pH and on the presence of chelating substances and other cations. Plants can accumulate Cd during plant growth, and the accumulation often occurs in edible parts, thus endangering crop yield and quality and becoming a potential hazard for human and animal health. Cadmium is suggested to cause damage even at very low concentrations, and healthy plants may contain Cd levels that are toxic for mammals .Moreover, it is widely recognized that Cd taken up by plants is the main source of Cd accumulation in food