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IMPACT OF CHEMICALLY SYNTHESIZED ZINC OXIDE NANOPARTICLES ON SALINE STRESSED WHEAT | PLANT CELL ...

Nanotechnology is a multidisciplinary methodology that encompasses agriculture, medicine, materials, electronics, and food packaging due to multiple engineering methodologies, but it also requires extensive study due to controversial safety and toxicity concerns. The aim of this research was to see how chemically engineered ZnO nanoparticles (NPs) affected wheat cultivars Misr1 (tolerant) and Gimmeza11's salinity stress tolerance in two seasons from 2018 to 2020. (sensitive). The data revealed an improvement in some biochemical parameters such as photosynthetic pigments, reduced glutathione, and the strength of some native PAGE bands of superoxide dismutase, all of which may be related to the increased intensity of some native PAGE bands of superoxide dismutase. related to salt tolerance and malondialdehyde reduction Due to the application of ZnO NPs, some changes in protein biosynthesis of wheat leaves were observed between the presence (1) and absence (0) of some bands, which could be linked to the antagonistic effect between metals, especially Zn. For the majority of the parameters studied, the most effective concentration was 1.0ppm. ZnO NPs were assessed at the molecular DNA level of wheat plants using the Inverse sequence- tagged repeat (ISTR) assay against five primers, with the highest polymorphic bands (86.6 percent polymorphism) at F9, B3 primer and 20 unique bands with primer F4, B7, The highest polymorphic bands treated with ZnO NPs as compared to the control indicate the degree of DNA alterations, but the function of DNA repair system enzymes cannot be overlooked. On two wheat cultivars, the biological analysis revealed the effectiveness of ZnO NPs as a foliar spray (Misr 1 and Gimmeza11). To determine their protection, we used Wistar Albino rats and repeated doses for 28 days to determine the median lethal dose (LD50). ZnO NPs had no impact on the levels of liver and kidney functions, as well as histopathological events, which all stayed within normalised values, allowing the controversy about the use of ZnO NPs in a wide range of fields to be turned around switch it off .



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