Element Content and Distribution in Cereal Crops Grown on Copper Polluted Soil
II. Effect of Excess Copper on Element Uptake in Wheat and Rye

I. BOGOEVA and E. MITEVA
Plant Protection Institute, BG-2230 Kostinbrod, Bulgaria

Abstract

BOGOEVA, I. and E. MITEVA, 2003. Element content and distribution in cereal crops grown on copper polluted soil. 2. Effect of excess copper on element uptake in wheat and rye. Bulg. J. Agric. Sci., 9: 463–468

A greenhouse experiment was carried out – typical Bulgarian cultivars of rye (Secale cereale) and wheat (Triticum aestivum) were grown on copper polluted soil in various concentrations of this metal: 150, 250 and 400 mg.kg–1 of soil. Atomic absorption spectrometry under flame regime and acetylenic mixture was used for determination the content of Cu and other elements: Fe, Mn, Mo, Na, K, Mg, Ca, Zn; concentration of N was measured by classical Kjeldahl`s method; of P – colorimetricaly. Increased accumulation of Cu and other metals was established in the roots of investigated plants; in stems and seeds the quantity of determined elements was not so essential. A linear dependence between elevated copper application into the soil and its magnification in the roots of explored plants was also observed.
Comparing the investigated cereal species, according to their ability to accumulate heavy metals, a similar response to the applied copper stress was established. Cu uptake in all organs of rye was determined to be higher than those in the organs of wheat.

Key words: element uptake, heavy metal pollution, copper accumulation, atomic absorption spectrometry, wheat, rye