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

文献类型： 外文期刊

第一作者： Yao, Xiaoqin

作者： Yao, Xiaoqin;Chu, Jianzhou;Ba, Chaojie;Yao, Xiaoqin

作者机构：

关键词： Enhanced UV-B;Selenium;Wheat

期刊名称：BIOLOGICAL TRACE ELEMENT RESEARCH （ 影响因子：3.738； 五年影响因子：3.44 ）

ISSN： 0163-4984

年卷期： 2010 年 136 卷 1 期

页码：

收录情况： SCI

摘要： 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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