【摘要】 重金属镉(Cd)虽然不是植物生长的必需矿质元素,但依然能被植物吸收。且部分植物具有富集镉的特点,从而导致农产品镉含量超标,并通过食物链危害人类健康。研究植物吸收、转运和积累Cd的机理,对于培育低镉作物品种、降低农产品镉含量,以及选育超富集镉植物,修复镉污染土壤具有重要意义。从影响植物吸收Cd的因子,植物吸收、转运和积累Cd的机理以及植物拒Cd和富集Cd的分子机制等方面进行综述,以期为低镉作物的研究以及Cd污染土壤的综合治理提供一些参考。更多还原

【Abstract】 Heavy metal cadmium(Cd) is not an essential mineral element for plant growth. Yet plant can absorb cadmium, and some plants possess the feature of Cd-enrichment, hence excessive Cd content in agricultural products. Human health is thus endangered via food chain. The research on the mechanism of Cd absorption, transport and accumulation in plants shall cast great significance on the cultivation of crop varieties with low-Cd accumulation, the reduction of Cd in agricultural products, and the breeding of Cdhyperaccumulators and the reparation of Cd-contaminated soil. The factors that affect Cd absorption in plant,the mechanism of Cd absorption, transport and accumulation in plant, and the research on the molecular mechanisms of resistance of plant to Cd stress and Cd-hyperaccumulators was summarized on the whole,expecting to provide some references for people to carry out research on plants with low-Cd accumulation and the comprehensive treatment of Cd-contaminated soil.更多还原