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KMID : 0613820060160030522
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Journal of Life Science
2006 Volume.16 No. 3 p.522 ~ p.526
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Effect of UV-B on Fatty Acid Composition, Lipid Peroxidation and Polyamine in Kidney Bean (Phaseolus vulgaris L.)
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Kim Hak-Yoon
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Abstract
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To investigate the effects of UV-B on fatty acid composition, lipid peroxidation and biochemical defense responses of plant, kidney bean (Phaseolus vulgaris L.) was subjected to enhanced UV-B irradiation [daily dose : 0.02 (No UV-B) and 11.36 (enhanced UV-B) kJ m?² ; UV-BBE] for 3 weeks. UV-B drastically inhibited both height and dry weight of kidney bean. The content of malondialdehyde significantly increased by about 50% after 3 weeks of UV-B irradiation. The ratio of unsaturated to saturated fatty acids of kidney bean was increased by UV-B irradiation. Three major polyamines of kidney bean leaves : putrescine, spermidine and spermine, were observed. All of the polyamine contents were increased with UV-B irradiation. These results suggested that enhanced UV-B radiation caused oxidative stress on lipids and biochemical protection responses might be activated to prevent from damaging effects of oxidative stress generated by UV-B irradiation.
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KEYWORD
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Fatty acid, kidney bean, malondialdehyde, polyamines, UV-B
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