The Cd Uptake and Distribution Features in Plant Organs of Four Rice Cultivars

Field experiment was conducted to investigate the features of cadmium(Cd)accumulation and distribution of rice plant organs in four rice varieties. The results showed that the rice root was the main plant organ to uptake Cd,it also was the main storage site of Cd.The Cd content of grain (brown rice)was significantly lower than in other organs at maturity stage.The concentration order of heavy metal Cd in different plant organs was root sheath leaf stem grain,but the order changed with the different varieties. Based on the results which Cd accumulation of four rice varieties was analysed in mature stage,9311 was the variety of high accumulation Cd,the Cd content of brown rice was very low in Jia-48 and Jia-51.The ability to Cd uptake and accumulation was significantly different in rice varieties,but the inter-type rice(japonica and indica rooms)was not significantly different.