Abstract:Effects of α-NAA and UV-B radiation on photosynthetic pigments and activities of protective enzymes in greenhouse-grown Trichosanthes kirilowii Maxim leaves were investigated. The results showed that addition of 2mg/L α-NAA could increase the content of chlorophyll and carotenoids and the activities of superoxide dismutase(SOD), catalase(CAT), peroxidase(POD), and ascorbate peroxidase (ASP), but did not significantly affect membrane permeability and lipid peroxidation (MDA content) in leaves. Exposure to 0....