The effects of NO application on the shoot a potassium (K), b magnesium (Mg), c calcium (Ca) and d sodium (Na) 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