Bean Plants Exposed to Cerium Oxide Nanoparticles Modified Physiological Characteristics and Shows Translocation to the Next Trophic Level:Implications in Plant Nutrition and Human Health?

摘要

This research aimed to uncover the physiological and biochemical effects of nanoceria (nCeO2),on kidney bean plants.Studies were performed in hydroponic,and low and high organic matter containing soils.Root uptake and aerial translocation of nCeO2 were studied using ICP-OES/MS,SEM and synchrotron μ-XRF/XANES.Effects of nCeO2 on plant physiology,metabolism,kidney bean nutritional quality,proteomic analysis and the possibility of transfer of nCeO2 along the food chain were also assessed.Results showed that kidney bean plants uptake nCeO2 at the point of emergence of lateral roots.Soil organic matter was found to play a critical role on the effects of nCeO2 on plant metabolism,stress response and bean quality.Cerium translocation to the leaves was enhanced by 71％ in organic matter rich soil,compared to low organic matter containing soil at 500 mg nCeO2 kg-1.