土壤重金属镉对高等植物的毒性效应研究进展

Advances in Toxic Effects of Soil Heavy Metal Cadmium on Higher Plants

重金属镉在土壤-植物中有较高迁移率,不仅直接影响植物生长发育、降低作物产量与品质,还可通过食物链进入人体,严重危害人类健康。本文通过大量文献调研,以有食用价值的作物和有经济价值的其他高等植物为研究对象,系统综述了近年来土壤重金属镉的毒性效应最新进展,主要包括镉对高等植物生长发育、生理生化、细胞超微结构、生物量和产量以及作物营养品质等方面的影响。本文重点总结了镉对高等植物抗氧化系统和光合系统毒性机制,并对未来研究中应重点关注的领域方向进行了展望。

The high mobility of heavy metal cadmium in a soil-plant system not only directly affects the plant growth and development,reduces crop yield and quality,but also seriously endangers human health through the food chain.Through a large amount of literature investigation,this review took the edible crops and other higher plants with economic value as the research objects,and systematically summarized the latest progress in the toxic effects of heavy metal cadmium in recent years,mainly including effects of cadmium on plant growth and development,physiology and biochemistry,cell ultrastructure,biomass and yield,and crop quality.This review focused on the toxic mechanisms of cadmium on the antioxidant and photosynthetic systems of higher plants,and prospected the areas that should be focused on in future research.