Effect of gamma irradiation or potassium on oxidative stress and antioxidant system of cadmium stressed Brassica rapa (L.) plant. Shaimaa Abd El-Hameed Abo Hamad, Mahmoud Abu Elyazeed Abd Elhaak and Khalil Mahfouz Ghareeb Saad-Allah*

Iranian Journal of Plant Physiology

مقاله 2، دوره 2، شماره 3، تیر 2012، صفحه 435-443   

نوع مقاله: Original Article

شناسه دیجیتال (DOI): 10.30495/ijpp.2012.540778

چکیده

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 + gamma and cadmium + potassium on Brassica rapa germination, oxidative stress and antioxidant system were investigated under laboratory and greenhouse conditions. Germination percentage decreased progressively by increasing cadmium chloride concentrations. Gamma irradiation and potassium treatment enhanced the germination and reduced cadmium toxicity when combined with it. All of the treatments relatively caused overproduction of H₂O₂. Peroxidase and catalase activities were increased by the cadmium concentrations while ascorbic acid was decreased.
 
 
.

کلیدواژه‌ها

Brassica rapa؛ cadmium chloride؛ gamma doses؛ Potassium؛ germination؛ H2O2؛ Catalase؛ peroxides؛ Ascorbic acid