Cd - tolerance of maize, rye and wheat seedlings |
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Authors: | Ma?gorzata Wójicik Anna Tukendorf |
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Institution: | (1) Department of Plant Physiology, Maria Curie-Skłodowska University, Akademicka 19, 20-033 Lublin, Poland |
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Abstract: | The effect of cadmium on growth parameters of seedlings of maize, rye and wheat as well as the role of phytochelatins in Cd
detoxication in these species were studied. Cadmium was found to inhibit root growth and decrease fresh weight and water content
in roots and shoots of the studied plants. Although a considerably lower Cd accumulation was shown in maize seedlings than
in other species, they were characterized by the highest sensitivity to cadmium. Among γ-Glu-Cys peptides synthetized by plant
species, phytochelatins — glutathione derivatives predominated. In maize they were synthetized in amounts sufficient for binding
the total pool of the metal taken up, and the detoxication mechanism was localized in their roots. Larger amounts of cadmium
were accumulated in roots of wheat and rye, but the quantity of the formed γ-Glu-Cys peptides seems insufficient for detoxication
of the metal. |
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Keywords: | maize rye wheat phytochelatins tolerance to cadmium |
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