 Oxidative stress can be caused by the production of reactive oxygen species, ROS. These ROS can cause damage to cells if not neutralized by antioxidants. Antioxidants are compounds that can neutralize ROS and prevent cellular damage. Enzomatic antioxidants include superoxide dismutases, SOD, catalase, SCAT, and ascorbate peroxidase, APX. Non-enzymatic antioxidants include ascorbic acid, glutathione, flavonoids, carotenoids, and tocopherols. Oxidative stress can occur at any stage of plant growth and development, but it is particularly prevalent during fruit ripening and senescence. During these processes, ROS levels increase dramatically, leading to decreased fruit quality. In order to maintain optimal fruit quality, plants must have adequate levels of antioxidants to neutralize ROS. This article was authored by Milvia Luisa Rakchi.