中文摘要：

揭示植物对铅的吸收、转运、累积和解毒的分子机制，可以明晰农作物吸收铅的关键过程，阻控铅在粮食、蔬菜中的积累，降低重金属的食用风险；也可以阐明某些铅超积累植物的耐性与解毒机制，分离并克隆铅超积累的功能基因，培育高效的铅污染土壤修复植物．本文从铅进入植物的两个重要途径（叶片的吸附与吸收以及根系的吸收与转运）出发，系统总结讨论了植物对铅的吸收、转运、累积和分布的研究进展；采用胞外至胞内的空间顺序，分别从植物根系分泌物的解毒、细胞壁的固定和动态响应、细胞质膜的选择透过性作用、液泡的区隔化作用以及金属有机配体的螯合等方面论述植物铅耐性和解毒的分子机理，并在此基础上提出存在的问题和今后研究的重点．

英文摘要：

Contamination of soils by lead （Pb） is of widespread occurrence because of the industri- alization, urbanization, mining, and many other anthropogenic activities. It is urgent and necessary for scientists to uncover the mechanisms of uptake, translocation, accumulation and detoxification of Pb in plants for the following two reasons. First, it helps target and regulate the key process of Pb uptake by crops and vegetables and minimize the threat of Pb introduction to the food chain. Se- cond, it helps cultivate Pb hyperaccumulating plants that can absorb and sequester excessive amounts from contaminated soils in their biomass without incurring damage to basic metabolic func- tions. The purpose of this review was to summarize the research advances in uptake, translocation and accumulation of Pb in plants and address the mechanisms by which plants or plant systems de- toxify Pb. The further researches on the foliar uptake, the interactions between soil components and plant cell wall, as well as the integrated technologies for phytoremediation of Pb-contaminated soils were prospected.