首页|Enhanced efficiency of cadmium removal by Boehmeria nivea (L.) Gaud. In the presence of exogenous citric and oxalic acids
Enhanced efficiency of cadmium removal by Boehmeria nivea (L.) Gaud. In the presence of exogenous citric and oxalic acids
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Boehmeria nivea (L.) Gaud.is a potential candidate for the remediation of Cd contaminated sites.The present investigation aims to explore Cd tolerance threshold and to quickly identify the role of exogenous organic acids in Cd uptake and abiotic metal stress damage.Elevated Cd levels (0-10 mg/L) resulted in an obvious rise in Cd accumulation,ranging from 268.0 to 374.4 in root and 25.2 to 41.2 mg/kg dry weight in shoot,respectively.Citric acid at 1.5 mmol/L significantly facilitated Cd uptake by 26.7％ in root and by 1-fold in shoot,respectively.Cd translocation efficiency from root to shoot was improved by a maximum of 66.4％ under 3 mmol/L of oxalic acid.Citric acid exhibited more prominent mitigating effect than oxalic acid due to its stronger ligand affinity for chelating with metal and avoiding the toxicity injury of free Cd ions more efficiently.The present work provides a potential strategy for efficient Cd remediation with B.nivea.
Heavy metalPhytoremediationLipid peroxidationAntioxidant defenseTranslocation factor
Huaying Li、Yunguo Liu、Guangming Zeng、Lu Zhou、Xin Wang、Yaqin Wang、Chunlin Wang
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College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, China
College of Resources and Environmental Science, Hunan Normal University, Changsha 410081, China
National Natural Science Foundation of ChinaNatural Science Foundation of Hunan provinceScience and Technology Planning Project of Hunan Province,China
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