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Protective role of selenium in wheat seedlings subjected to enhanced UV-B radiation

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Abstract

Selenium (Se) is beneficial for some plants and is able to increase resistance and antioxidant capacity of plants subjected to stressful environment. In this work, the effects of enhanced ultraviolet-B (UV-B) radiation, Se supply, and their combination on growth and physiological traits of wheat (Triticum aestivum L., cv. Han NO.7086) seedlings were studied. The objective was to elucidate whether Se could alleviate the expected adverse effects of UV-B stress on seedlings. UV-B treatment caused a marked decline in growth parameters and total chlorophyll content and changed biomass allocation between aboveground and underground parts, which led to an increase in the root/shoot ratio. UV-B treatment also increased MDA content and the rate of superoxide radical (O ·−2 ) production, although it increased some antioxidant (proline, phenolic compounds, and flavonoids) content and activity of antioxidant enzymes (peroxidase, superoxide dimutase, catalase (CAT)). Se treatment only increased total chlorophyll content and CAT activity. Compared with UV-B treatment alone, the combined treatment with UV-B and Se induced a significant increase in the biomass, total chlorophyll content, antioxidant content, and activity of antioxidant enzymes, and an evident decrease in MDA content and the rate of O ·−2 production. The results of this study demonstrated that Se alleviated the damage caused by UV-B to wheat seedlings to some extent by increasing antioxidant enzyme activity and antioxidant content.

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Abbreviations

Car:

carotenoids

CAT:

catalase

Chl:

chlorophyll

POD:

peroxidase

SOD:

superoxide oxidase

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Authors and Affiliations

  1. The College of Life Sciences, Hebei University, Baoding, 071002, P. R. China

    X. Yao, J. Chu, X. He & C. Ba

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  1. X. Yao
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  2. J. Chu
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  3. X. He
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  4. C. Ba
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Correspondence to X. Yao.

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Yao, X., Chu, J., He, X. et al. Protective role of selenium in wheat seedlings subjected to enhanced UV-B radiation. Russ J Plant Physiol 58, 283–289 (2011). https://doi.org/10.1134/S1021443711020257

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  • DOI: https://doi.org/10.1134/S1021443711020257

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