Abstract
A cultivation experiment was conducted in a high-cadmium-contaminated field to evaluate the cadmium uptake by taro (Colocasia esculenta Schott cv. Dodare), Japanese radish (Raphanus sativus L. cv. Harunomegumi) and potato (Solanum tuberosum L. cv. Dansyaku). The cadmium concentration of the whole plants was in the order of taro>potato>Japanese radish. In addition, the cadmium concentration in the edible parts (daughter corm of taro, Japanese radish root and peeled potato) of each plant was the lower than that in the other parts. The shoots of Japanese radish and potato accumulated much more cadmium than the roots during cultivation. It is concluded that the edible part of the Japanese radish root is a safer food material with lower cadmium content than the other root crops.
