Effect of Ultraviolet (UV-B) on Antioxidents and Antioxidative Enzymes in Garden Balsam (Impatiens balsamina L.)

• Published in: Korean Journal of Weed Science Vol. 30; no. 2
• Main Author: Kim, H.Y., Keimyung University, Daegu, Republic of Korea
• Format: Journal Article
• Language: Korean
• Published: 01.06.2010
• Subjects: ANTIOXIDANTES; ANTIOXIDANTS; antioxidative enzymes; ANTIOXYDANT; garden balsam; UV-B
• ISSN: 0253-7468

To investigate the effects of ultraviolet (UV-B) on growth and biochemical defense responses of plant, garden balsam (Impatiens balsamina L.) was subjected to enhanced UV-B irradiation [daily dose: 0.02 (No UV-B) and 11.34 (enhanced UV-B) kJ m-² ; UV-B∧BE] for 3 weeks. Enhanced UV-B drastically inhibited leaf area as well as dry weight of garden balsam. The content of malondialdehyde was significantly increased by about 50% after 3weeks of UV-B irrdaiation. Ther ratios of dehydroascorbate/ascorbate and oxidized glutathione/reduced glutathione were also considerably increased by UV-B irradiation. Three major polyamines of garden balsam leaves: putrescine, spermidine and spermine were observed. All polyamine contents were increased with UV-B irradiation. The enzyme (superoxide dismutase, ascorbate peroxidase etc.) activities of garden balsam were increased by the UV-B enhancement. Based on the results, enhanced UV-B caused oxidative stress in garden balsam and biochemical protection responses might be activated to prevent from damaging effects of oxidative stress generated by UV-B irradiation.