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Protective Effect of Rare Earth Against Oxidative Stress Under Ultraviolet-B Radiation

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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 (\({\text{O}}_{\text{2}}^ \cdot \,^ - \)) 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, \({\text{O}}_{\text{2}}^ \cdot \,^ - \), 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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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (30570323) and the Foundation of State Planning Committee (IFZ20051210).

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Correspondence to Xiaohua Huang or Qing Zhou.

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Wang, L., Huang, X. & Zhou, Q. Protective Effect of Rare Earth Against Oxidative Stress Under Ultraviolet-B Radiation. Biol Trace Elem Res 128, 82–93 (2009). https://doi.org/10.1007/s12011-008-8250-4

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  • DOI: https://doi.org/10.1007/s12011-008-8250-4

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