Fig. 3From: Foliar application of putrescine, salicylic acid, and ascorbic acid mitigates frost stress damage in Vitis vinifera cv. ‘Giziluzum’Effect of exogenous Put, SA, and AsA pretreatment on catalase (CAT) (A), guaiacol peroxidase (GPX) (B), ascorbate peroxidase (APX) (C) and superoxide dismutase (SOD) (D) contents in ‘Giziluzum’ under frost stress. Different letters are significantly different based on Duncan’s multiple range test (p ≤ 0.05)Back to article page