| .田间试验条件下不同基因型水稻对Cd和Pb的吸收分配特征[J].农业环境科学学报,2013,32(3):. |
| 田间试验条件下不同基因型水稻对Cd和Pb的吸收分配特征 |
| Uptake and Partition of Cd and Pb Among Rice Genotypes in Contaminated Paddy Soil |
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| DOI：10.11654/jaes.2013.03.005 |
| 中文关键词: 水稻 品种 Cd Pb 积累 器官间分配 |
| 英文关键词: rice（Oryza sativa L.）, genotype , Cd, Pb, uptake, partitioning |
| 基金项目: |
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| 摘要点击次数: 1934 |
| 全文下载次数: 1892 |
| 中文摘要: |
| 准确阐明重金属污染土壤中不同基因型水稻品种生长和重金属摄收与积累特征是实现安全生产的保障。以浙江省主栽的11个单季杂交晚稻和常规晚稻为供试品种，在台州温岭Cd、Pb污染土壤上种植，研究了不同基因型水稻对Cd、Pb元素吸收积累的差异。结果表明，不同基因型水稻糙米Cd、Pb含量存在较大差异，其中秀水09、黄华占、秀优5号和绍糯9714糙米Cd含量未超标，钱优8704和黄华占糙米Pb含量未超标。Cd、Pb在不同器官间的分配存在差异，总体上Cd浓度表现为根>茎>叶、糙米，Pb浓度表现为根>叶>茎>糙米。水稻不同亚种和杂交组合各器官对Cd、Pb积累存在差异，糙米和茎、根Cd含量与水稻类型关系密切，糙米Cd浓度的顺序为籼型杂交稻>粳型杂交稻>常规籼稻>常规粳稻。除稻根外，其他器官Pb浓度与水稻类型无关。亲本不育系不同的杂交组合F1代的重金属积累存在差异，故可通过筛选重金属低积累的亲本，从遗传上加以改良，培育重金属摄收少、分配安全的杂交稻组合。 |
| 英文摘要: |
| To test whether rice genotypes varied in response to heavy metal polluted soil, a field experiment was conducted by using 11 rice genotypes in a heavy metal contaminated paddy soil in Wenling, Zhejiang Province. Uptake and partitioning of Cd and Pb in the 11 rice genotypes were investigated. The concentrations of Cd and Pb in grain, leaf, stem and root of rice plants significantly varied among the 11 rice genotypes in this experiment. The concentration of Cd in brown rice of Xiushui09, Huanghuazhan, Xiuyou5 and Shaonuo9714 did not exceed the maximum permissible concentration（MPC） of heavy metals in the edible parts of crops（GB 2762—2005）, while the concentration of Pb in brown rice of Qianyou8704 and Huanghuazhan did not exceed the MPC. The partitioning pattern of Cd and Pb in various parts of rice plants was similar among the genotypes. The distribution pattern of Cd concentration in various parts of rice plants was in the order of root>stem>leaf and brown rice. For Pb, the pattern was in the order of root>leaf>stem>brown rice. The data analysis showed that Cd concentration in brown rice, stem and root highly related to rice subspecies. Indica hybrid rice had highest Cd concentration in its brown rice, and then japonica hybrid and indica. The japonica rice had lowest Cd concentration in its brown rice. For Pb, however, only concentration in root showed to relate with rice subspecies. Results from this experiment also indicated a significant difference of heavy metal accumulation among various male sterile lines. This result suggested that using male sterile lines with low heavy-metal-uptake trait in hybrid breeding could be an important approach for food production safety in the metal contaminated paddy soil. |
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