EFFECT OF TREATED WASTWATER IRRIGATIONON ON PHYSIOLOGICAL TRAITS AND ANTIOXIDANT DEFENSE ANALYSIS OF TOMATO AND CUCUMBERBELAHCENE NABIHA, ZENATI NOUREDDINE, BOUZATA C. AND GUEFASSA YOUCEFAbstract Our study is conducted on the behavior of two species, the tomato and the cucumber, irrigated by three types of water from different origins. The first is from spring water, the second is from wastewater from the sewage treatment plant and is biologically treated, and the third is from dam water. The results obtained on seedlings irrigated by treated wastewater show good development compared to seedlings irrigated by spring water and those from the dam. Irrigation with purified water and those from the dam induces oxidative stress in the two species studied during their growth. The response to this xenobiotic is almost similar for both cultures. The analysis of the non-enzymatic parameters showed an overproduction of peroxidation of membrane lipids and glutathione under the effect of the stress generated by the waters of the station and the dam, their levels increase significantly in the two species studied. Analysis of the antioxidant enzymes, catalase, ascorbate peroxidase and guaïacol peroxidase, indicates that irrigation with purified wastewater causes activation of these enzymatic biomarkers in tomato and cucumber. |