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http://dx.doi.org/10.5660/KJWS.2010.30.2.135

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

Kim, Hak-Yoon (Department of Global Environment, Keimyung University)
Publication Information
Korean Journal of Weed Science / v.30, no.2, 2010 , pp. 135-142 More about this Journal
Abstract
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 3 weeks of UV-B irradiation. The 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.
Keywords
antioxidants; antioxidative enzymes; garden balsam; UV-B;
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Times Cited By KSCI : 2  (Citation Analysis)
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