Effect of heavy metals on the distribution of P, K, Ca, Mg and micronutrients in the cellular constituents of coconut leaf
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1989-06
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The distribution patterns of P, K, Ca, Mg and micronutrients with special reference to heavy metal treatments have been evaluated in coconut and the results indicated that the P distribution in organic acids, polar compounds, proteins and nucleic acids and polysaccharides has been, influenced by the heavy metals. However, the K content of lipids and pigments, organic acids, cellulose and insoluble residues has been significantly altered due to heavy metal treatment. The Ca concentration in lipids and pigments and organic acids has been significantly depressed by heavy metals. A similar pattern of depression of Mg content has been recorded in nucleic acid, polysaccharides and organic acid fractions. Among micronutrients, iron content in proteins, cellulose and insoluble fractions increased by heavy metals in general and due to Pb and Cd significantly in pigments. All the seven heavy metals increased the Mn content in polar compounds over control. Cadmium, Bismuth, Chromium and Barium exerted profound increase in Zinc distribution in polysaccharides and insoluble residues over control. There was no change in Zinc concentration with lipids, pigments and organic acids. In respect of Copper there was noticeable change due to heavy metals in pigments, cellulose, polysaccharides and insoluble residues. Copper content increased insoluble residues and pigments.
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Journal of Plantation Crops 17(1) : 1-9 June, 1989