The response of rapeseed under salt stress to the application of zinc sulfate in the rosette stage

A greenhouse study was conducted to explore the effect of various rates of Zinc sulfate (ZnSO4) on rapeseed (Brassica napus L.) growth and physiological response under salt stress (0, 50 and 100 mM) and four ZnSO4 treatments consisting of, 0, 20, 40 and 80 mg-1L of the were applied. Increasing ZnSO4 at the 40 mg-1L resulted in increasing shoot dry weight, and root length and root dry weight in rapeseed but the increase did not have a significant effect. The different foliar application at the full rosette stage affected significantly Na/K ratio and the concentrations in plant tissue. The application of ZnSO4 at the 40 mg-1L rate enhanced the plant‟s physiological response to salt stress by reducing electrolyte leakage, increasing catalase and MDA content, and increasing antioxidant enzymes, activity. The highest activities of catalase and guaiacol peroxidase were observed in plants treated with 100 mM of NaCl, but the application of ZnSO4 declined these antioxidant activities

کلیدواژه ها:

Rapeseed ، ZnSO4 ، Salt stress ، Antioxidant enzymes