Fig. 3.

The effects of NO application on the a osmotic potential, b hydroxyl radical (•OH) activity, c hydrogen peroxide, d leaf electrolyte leakage, e proline and f MDA content of two contrasting watermelon (Citrullus lanatus var. lanatus) genotypes [tolerant, KAR 98 and susceptible, KAR 147] grown in drought stress condition. Values are mean ± S.E. (standard error) based on four replications (n = 4). Control no drought stress no SNP (NO donor), PEG drought stress treatment, PEG + NO drought stress + SNP treatment