peroxidation Lipid peroxidation in pepper leaves increased with time and PEG levels (Fig. 7). At T1 MDA content increased with higher PEG lev-els (Fig. 7A) in all plants. The increase was highest in the ungrafted plants. After 14 days of exposure, lipid peroxidation increased sig-nificantly at 7% PEG in all plants and 12/cultivar and 14/cultivar plants at 3.5%.