Effect of spring wheat (Triticum aestivum L.) treatment with brassinosteroids on the content of cadmium and lead in plant aerial biomass and grain
Kroutil, M.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Chemie | Hejtmankova, A.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Chemie | Lachman, J.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Chemie
Spring wheat var. Vanek was cultivated in pots in a soil naturally contaminated with heavy metals. Experimental plants were treated with three different types of brassinosteroids (BRs; 24-epibrassinolide, 24-epicastasterone and 4154) during two different growth stages 29-31 DC (off shooting) and 59-60 DC (beginning of anthesis). Concentrations of heavy metals (Cu, Cd, Pb and Zn) were determined using the AAS method in the plant growth stages 47-49 DC (visible awns), 73-75 DC (30-50% of final grain size) and 90-92 DC (full ripeness). At the stages 47-49 DC and 73-75 DC, concentrations of heavy metals were determined in the biomass of whole plants, while at the stage 90-92 DC they were determined separately in straw and grains. After the treatment of plants with BRs a decrease in heavy metals levels was observed in the growth stage 73-75 DC (i.e. during the period when the plants are harvested for ensilage purposes). Likewise, Pb level decreased in the grains by 70-74% in the plants treated at both stages 29-31 DC and 59-60 DC, and by 48-70% in the plants treated only at stage 59-60 DC.
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