摘要：Heavy metals of soils due to intensive industrial activities and agricultural development is usually a source of environmental problems. Heavy metal phytotoxicity is considered to be main factor limiting plant growth when cultivate in metal polluted soils. Heavy metals have strong impact on human health through the food chain. The aim of this study was to investigate the ill effects of cadmium on the morphological, biochemical and enzymatic characters of Vigna mungo (L.) Hepper which are commonly used in the fireworks industries of this area. After ten days treatment with different concentrations of cadmium (2, 4, 6, 8 & 10mM), the plant exhibited a decline in growth, chlorophyll contents, soluble sugar and protein than in the control. In contrary, the content of free amino acid, proline, leaf nitrate and the activities of enzymes such as catalase and peroxidase were found increased with the increase in the concentration of cadmium while the activity of nitrate reductase were found to be decreased. Comparison of the parameters analyzed between the treated and control reveals that cadmium have seriously affected the Vigna mungo (L.) Hepper. Based on this, it was concluded that high concentration of cadmium severely affect the plant growth and result in growth inhibition, decline in physiological and biochemical activities of crop plants.
关键词：Cadmium; Catalase; Peroxidise; Free Amino Acid; Proline and Leaf Nitrate
