Application of exogenous organic acids and remediation process of lead and cadmium contamination in canola plants. Hakimeh Oloumi*, Effat Ahmadi Mousavi and Neda Hasibi

Heavy metal contamination of soil, water and air has caused serious environmental hazard in the biosphere due to rapid industrialization and urbanization. A variety of metal binding ligands such as organic acids and amino acids involve in the heavy metal remediation mechanisms by plants. This paper analyses the possible role of amino acid histidine and organic acids, namely, citric, oxalic and fumaric acids to elevate the absorption of Pb and Cd by canola plants. Soaked seeds were placed in plastic dishes of 10cm diameter with a layer of filter paper on bottom and 10 ml aqueous solution of each treatment with certain Pb and Cd and concentration was added. After 72 hours, the content of Cd and Pb in canola seedlings was measured using atomic absorption technique. All data compared using ANOVA test and SPSS (v. 17) and p