Interactive effects of ozone and low UV-B radiation on antioxidants in spruce (Picea abies) and pine (Pinus sylvestris) needles

acide ascorbique acido ascorbico antioxidantes antioxidants antioxydant ascorbic acid catalasa catalase glutathion glutathione glutation ozone ozono peroxidases picea abies pinus sylvestris plantule rayonnement ultraviolet seedlings superoxide dismutase superoxyde dismutase ultraviolet radiation