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Antioxidant Responses of Wheat Seedlings to Exogenous Selenium Supply Under Enhanced Ultraviolet-B

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Abstract

The paper reports the effects of selenium (Se) supply on growth and antioxidant traits of wheat (Triticum aestivum L. cv Han NO.7086) seedlings exposed to enhanced ultraviolet-B (UV-B) stress. Antioxidant responses of seedlings were different depending on the Se concentration. Compared with the control, the lower amount used (0.5 mg Se kg−1 soil) had no significant effect on biomass accumulation. The treatments with 1.0, 2.0, and 3.0 mg Se kg−1 promoted biomass accumulation of wheat seedlings, and the increased amount in biomass was the most at 1.0 mg Se kg−1 treatment. Se treatments with 1.0, 2.0, and 3.0 mg kg−1 also significantly increased activities of peroxidase (POD) and superoxide dismutase (SOD) and reduced the rate of superoxide radical (O −2 ) production and malondialdehyde (MDA) content of wheat seedlings. In addition, anthocyanins and phenolic compounds content in wheat seedlings evidently increased by the treatments with 1.0 and 2.0 mg Se kg−1. The lower Se treatment had no significant effect on MDA content, although it increased activities of antioxidant enzymes (POD, SOD, and catalase activities) and reduced the rate of O −2 production in wheat seedlings. These results suggest that optimal Se supply is favorable for the growth of wheat seedlings and that optimal Se supply can reduce oxidative stress of seedlings under enhanced UV-B radiation.

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Acknowledgments

This study was supported by the Open Fund of Key Laboratory of Crop Nutrition and Nutrient Cycling, Ministry of Agriculture of China (2008-1), Dr. Fund, Hebei University, China (2007-102) and Young Fund, Hebei University, China (2008Q46).

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Authors and Affiliations

  1. The College of Life Sciences, Hebei University, Baoding, 071002, People’s Republic of China

    Xiaoqin Yao, Jianzhou Chu & Chaojie Ba

  2. Key Laboratory of Crop Nutrition and Fertilization, Ministry of Agriculture of China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China

    Xiaoqin Yao

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  1. Xiaoqin Yao
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  2. Jianzhou Chu
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Correspondence to Xiaoqin Yao.

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Yao, X., Chu, J. & Ba, C. Antioxidant Responses of Wheat Seedlings to Exogenous Selenium Supply Under Enhanced Ultraviolet-B. Biol Trace Elem Res 136, 96–105 (2010). https://doi.org/10.1007/s12011-009-8520-9

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  • DOI: https://doi.org/10.1007/s12011-009-8520-9

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