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Research advances in uptake, translocation, accumulation and detoxification of Pb in plants.

DUAN De-chao1, YU Ming-ge1,2, SHI Ji-yan1   

  1. (1College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; 2Hangzhou Environmental Group Co., Ltd., Hangzhou 310022, China)
  • Online:2014-01-18 Published:2014-01-18

Abstract:

Contamination of soils by lead (Pb) is of widespread occurrence because of the industrialization, 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 functions. 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 detoxify 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.