Fig. 1From: 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 Chl. a (A), Chl b (B), Total Chl (C) and carotenoid (D) in ‘Giziluzum’ under frost stress. Different letters are significantly different based on Duncan’s multiple range test (p ≤ 0.05)Back to article page