Plant Soil Environ., 2002, 48(12):531-535 | DOI: 10.17221/4408-PSE

The effect of Cd and Zn contents in plants on Fe binding into organic substances of spinach biomass

D. Pavlíková, M. Pavlík, J. Száková, S. Vašíčková, P. Tlustoš, J. Balík
1 Czech University of Agriculture in Prague, Czech Republic
2 Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic

Partial characterization of iron binding compounds in spinach above ground biomass and differences between binding of Cd, Zn and Fe in spinach biomass were investigated on two soils treated by sewage sludge in model pot experiment. After application of sludge to both soils, Cd and Zn accumulation in spinach biomass was increased in sludge treatments. Total Fe content in biomass showed opposite trend with these treatments and was decreased 2.5-2.7 fold. Results of sequential analysis of spinach biomass showed lower portions of iron in all individual fractions of both sewage sludge treatments compared to control treatments. The largest differences in iron content between control and sludge treatments were determined in ethyl acetate fraction. While majorities of Cd and Zn were found in fractions methanol + H2O and H2O and methanol + H2O + HCl, iron content determined in these two fractions was only 7-8% in control treatments and 15-20% in sludge treatments of total iron. In fraction, Fe portion was 87.7-90.7% in treatments without sludge and 76.1-83.5% in sludge treatments in spinach biomass. Results showed tighter iron binding to plant cell membranes in contrast to cadmium and zinc.

Keywords: iron; Fe-binding compounds; sequential extraction; spinach; cadmium; zinc

Published: December 31, 2002  Show citation

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Pavlíková D, Pavlík M, Száková J, Vašíčková S, Tlustoš P, Balík J. The effect of Cd and Zn contents in plants on Fe binding into organic substances of spinach biomass. Plant Soil Environ. 2002;48(12):531-535. doi: 10.17221/4408-PSE.
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