As an important antioxidant for plants and humans. L-ascorbic acid (AsA. vitamin C) can scavenge reactive oxygen species (ROS) and can be regenerated from its oxidized form in a reaction catalyzed by dehydroascorbate reductase (DHAR). To analyse the effect of overexpressing DHAR on tomato (Solanum lycopersicum). https://parisnaturalfoodes.shop/product-category/ph-paper/