Research Advance on the Mechanism of Cadmium Transport in Rice

• 作者: Liu Zhongqi
• 来源期刊: 气象与环境研究：英文版
• 学科: 农学
• 关键词: 镉(CD) 水稻产区 离子转运 水稻品种 机理 交通 转运蛋白 运输效率
• 年，卷（期）: 2014,（5）
• 页码范围: 48-52
• 页数: 5页
• 分类号: S511

摘要

Soils in part of rice production areas have been seriously contaminated by cadmium( Cd). Rice with high Cd content over allowable limit produced in these areas is widely concerned. Low accumulation varieties can remarkably decrease the Cd content in rice as well as the risk of food safety. The translocation of Cd either from soil to root system or from roots to aboveground parts is identified by a lot of ion transport proteins.Transport efficiency of Cd in some rice varieties is regulated by special metal ionic transporters. However,most varieties transport Cd by cation transporters or universal ionic transporters. Both the expression levels and time of gens controlling ionic transporters directly influence the Cd transport rates inside rice plant and the accumulation amount in different organs. Screening and utilizing specific Cd transport genes are the genetic basis of breeding low accumulation varieties.