Abstract
In this research, effects of different lead concentrations (0, 10, 100 mg/L), one of toxic metals, applied in hydroponic medium on some physiological characteristics of bread wheat variety Tosunbey were investigated. It was determined by root and shoot lengths measurements that lead stress inhibited growth and development in the wheat. Lead concentrations of root and shoot in the wheat variety were determined to be increased by applied Pb concentration. On the other side lead stress decreased photosynthetic pigment amounts of the wheat leaves. Applied lead reduced protein and phenolic compound amounts of root and shoots of the plant. Although ascorbic acid amount of roots increased in the effect of Pb, decline was determined in shoots. As a result of lead application increases in non-protein SH groups and proline amounts in root and shoots may show their roles in plant response to lead toxicity.
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