The treatment also enhanced the activities of antioxidant enzymes including superoxide dismutase, catalase and ascorbate peroxidase, and maintained lower levels of superoxide anion, hydrogen peroxide, and malondialdehyde. In addition, the 1,1-diphenyl-2-picrylhydrazy (DPPH) radical-scavenging activity, total phenolic, ascorbic acid, total sugar content, as well as titratable acidity (TA) were increased by blue light exposure.