*4.7. Plant Stress Indicators*

Cell damage index of lipid peroxidation in leaves was assessed in terms of malondialdehyde content, which was determined by the thiobarbituric acid reaction [72]. Hydrogen peroxide content was measured according to the method of Loreto and Velikova [73]. The results were expressed as nmol MDA or μmol H2O2 per g FW. Four replicates were analyzed for each treatment and sampling date.
