Protective Effect of Rare Earth Against Oxidative Stress Under Ultraviolet-B Radiation |
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| Authors: | Lihong Wang Xiaohua Huang Qing Zhou |
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| Institution: | (1) Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, 214122, People’s Republic of China;(2) Jiangsu Key of Biofunctional Materials, College of Chemistry and Environmental Science, Nanjing Normal University, Nanjing, 210097, People’s Republic of China;(3) School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, People’s Republic of China |
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| Abstract: | The effects of lanthanum (III) (La(III)) in protecting soybean leaves against oxidative stress induced by ultraviolet-B (UV-B)
radiation were investigated. The increase in contents of hydrogen peroxide (H2O2) and superoxide ( ) due to UV-B radiation suggested oxidative stress. The increase in the content of malondialdehyde (MDA) and the decrease
in the index of unsaturated fatty acid (IUFA) indicated oxidative damage on cell membrane induced by UV-B radiation. La(III)
partially reversed UV-B-radiation-induced damage of plant growth. The reduction in the contents of H2O2,  , and MDA and increase in the content of IUFA, compared with UV-B treatment, also indicated that La(III) alleviated the oxidative
damage induced by UV-B radiation. The increase in the activities of superoxide dismutase and peroxidase and the contents of
ascorbate, carotinoids, and flavonoids were observed in soybean leaves with La(III) + UV-B treatment, compared with UV-B treatment.
Our data suggested that La(III) could protect soybean plants from UV-B-radiation-induced oxidative stress by reacting with
reactive oxygen species directly or by improving the defense system of plants. |
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| Keywords: | Rare earth Lanthanum Ultraviolet-B radiation Soybean seedlings Free radical Antioxidative system |
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