Accumulation And Transfer Of Cadmium, By Indica Rice Cultivars Fujian Province Of China

The cadmium accumulation ability of sixteen (16) indica rice cultivars was investigated. Results showed that there exists difference within the indica rice cultivars in terms of transfer factor and grain-Cadmium accumulation.Findings indicated that the mean Cadmium concentration in grains of the 16 indica rice cultivars decreased in order of Yi Xiang 2292 (0.69 mgkg-1)> Yi You 115 (0.31 mgkg-1)> Yi You 673,Yang Liang You 6, (0.22 mgkg-1)>Quan Zhen 10 (0.12 mg kg-1)> Shen Liang You 5814 (0.09 mg kg-1)> Fen Liang You 1, Na Ke 1 (0.08 mg kg-1)> Tian You 998, Te You 009,Yi You 99 (0.07 mg kg-1)>â…¡ You 3301, Pei Za Tai Fen (0.05 mg kg-1)>Jia Fu Zhan and Dong Lian 5 (0.04 mg kg-1). The accumulation ability of Cadmium of the 16 cultivars varied greatly. Yi Xiang 2292 had the highest TFsoil-grain (2.91), which was 22 times higher than the lowest cultivar Pei Za Tai Fen (0.13). However, no significant difference in TFsoil-grain was observed between conventional and hybrid cultivars.A further study was carried out to understand the characteristics of accumulation and transfer of Cadmium by using four (4) selected cultivars (both of hybrid and conventional indica rice cultivars). The results showed that in terms of Cadmium distribution the average concentration of Cadmium decreases in the pattern: root>stem>leaf>grain in the four cultivars except Te You 009 that showed similar Cadmium content in root and stem. Among the hybrid cultivars Yi You 673 accumulated the most Cadmium in root, stem, leaf and grain, while Te You 009 accumulated the least Cadmium in root, whereas the conventional cultivar Jia Fu Zhan accumulated the lowest Cadmium in leaf and grain. Our findings also revealed that the Cadmium concentrations in rice grains were more significantly correlated with the Cadmium in stem, followed by leaf, which reveals that the transfer from stem and leaf to grain may be the determinant steps for Cadmium accumulation in the grains.