Shaimaa Abd El-Hameed Abo-Hamad, Khalil Mahfouz Ghareeb Saad -Allah, Essam El-Deen Mohammed Abo-Kassem
The effect of cadmium chloride concentrations (25 50 75 and 100 mg/kg soil), seeds pre-irradiated by low doses of gamma rays (15 30 45 and 60 Gy), potassium chloride (60 mg/kg soil) and the combination of cadmium with gamma and cadmium with potassium on Brassica rapa primary and secondary metabolites at different growth stages were investigated. It was found that, combination of low doses of gamma or potassium with cadmium significantly increased the root soluble protein content at the various growth stages compared with the content of plants singly treated with cadmium. Proline, alkaloids and phenolic compounds were accumulated in roots in response to cadmium compared with the control and their accumulation was magnified by gamma irradiation. This suggested an important role for these compounds in plant response to cadmium pollution.
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