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| Differences in cadmium accumulation and transfer capacity among different types of rice cultivars |
| Received:January 19, 2016 |
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| KeyWord:rice;cultivar;cadmium;accumulation factor;transfer factor;production |
| Author Name | Affiliation | E-mail | | CAI Qiu-ling | College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou 350000, China
Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | LIN Da-song | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | WANG Guo | College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou 350000, China | gwang572003@yahoo.com.cn | | WANG Di | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | wdaepi@163.com |
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| Abstract: |
| In-situ plot experiments were conducted to investigate characteristics of cadmium accumulation and transferring among various organs in 84 varieties of rice. Based on the interaction of production and Cd accumulation in brown rice, statistical differences analysis of accumulation and transfer factors were explored to study the feature of the Cd accumulation and transfer of rice. The results indicated that: The Cd accumulation factors(AF) of brown rice in all rice varieties were 0.10~0.78, and the area production were 8.20~11.50 kg (3.5 m×3.5 m). There is no significant correlation between the rice production and Cd AF of brown rice. Based on interaction of rice production and Cd AF of brown rice, all varieties were sorted by clustering analysis into four groups as high production with high Cd accumulation(group 1), low production with high Cd accumulation(group 2), high production and low Cd accumulation(group 3), low production and low Cd accumulation(group 4). Cd AF in different organs of all varieties followed the order of root> stem> leaf> brown rice, decreasing in the transfer process from root to shoot. The difference of rice types with different production and concentration mainly depended on the accumulation and transfer in the stem and leaf. Rice varieties with high production or high Cd accumulation had strong capacities to transfer Cd from root to stem and further to leaf and brown rice. Production had no significant effect on the transfer capacity of Cd among different organs for the rice varieties with low Cd accumulation. It is feasible to screen and cultivate rice varieties with high production and low Cd accumulation that are suitable to plant in the middle and light Cd contaminated area. Controlling the absorption and transportation of the stem and leaf for Cd in the rice planting will be of great significance to ensure the safety of food production. |
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