Effect of hexavalent chromium (cr+6) and chelating agents on growth, uptake and biochemical lesions in flood resistant rice grown under water logged and drought conditions

Author(s): Mantry P.*, H. K. Patra

Abstract

The effect of hexavalent chromium (Cr+6)were studied in rice plants by applying two concentrations of Cr, i.e. 10 mg and 50 mg/Kg of soil supplementing with various chelators. The effect of (Cr+6)ions on the physical parameters such as root length, shoot length, fresh weight, dry weight, metal tolerance index and biochemical parameters such as chlorophyll, carotenoid, total sugar and protein content, catalase and peroxidase activity and the uptake of Cr in root and shoot were studied. A decrease in chlorophyll, carotenoid, sugar, protein content and enzyme activity was noticed at higher concentrations of Cr. Supplementation of ethylene diammine tetra acetic acid(EDTA), salicylic acid(SA) and citric acid (CA) as chelating agents also decreases the enzyme activity & other parameters as compared to plant treated with chromium only. Present investigation reports injurious effects of (Cr+6)on different aspects of rice plants. Cr accumulation in plant parts is a matter of serious concern to human health as it causes cardiovascular diseases, kidney failure & cancer.

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