Effect of Potassium Levels on Antioxidant Enzymes and Malondialdehyde Content under Drought Stress in Sunflower (Helianthus annuus L.)

H. Soleimanzadeh, D. Habibi, M. Ardakani, F. Paknejad and F. Rejali

American Journal of Agricultural and Biological Sciences 5 ( 1 ): 56 - 61 , 2010