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Damage repair effect of He-Ne laser on wheat exposed to enhanced ultraviolet-B radiation

文献类型： 外文期刊

作者： Yang, Liyan 2 ; Han, Rong 2 ; Sun, Yi 1 ;

作者机构： 1.Shanxi Acad Agr Sci, Biotechnol Res Ctr, Taiyuan 030031, Shanxi, Peoples R China

2.Shanxi Normal Univ, Linfen 041004, Peoples R China

3.Minist Agr, Key Lab Crop Gene Resources & Germplasm Enhanceme, Taiyuan 030031, Peoples R China

关键词： Germination;He-Ne laser;Seedling development;UV-B radiation;Wheat

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：4.27； 五年影响因子：4.816 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： We explored the use of He-Ne laser on alleviating the effects of ultraviolet-B (UV-B) light on winter wheat development. Triticum aestivum L. cv. Linyuan 077038 seeds were irradiated with either UV-B (10.08 kJ m ~(-2) d ~(-1)) (enhanced UV-B) or a combination of UV-B light and the He-Ne laser (5.43 mW mm ~(-2)). Plants also were exposed to the He-Ne laser alone. Our results showed that enhanced UV-B produced negative effects on seed germination and seedling development. Germination rate and shoot growth decreased compared with the control. Root development was inhibited, and root length was decreased. Chlorophyll content and expression of peroxidase (POD) isozymes and their activity decreased. Seedling height and shoot biomass dropped significantly compared to the control. Implementing the He-Ne laser partially alleviated the injury of enhanced UV-B radiation, because germination rate and shoot growth were enhanced together with root development. Chlorophyll content and POD expression and activity increased. Seedling height and shoot biomass were increased. Furthermore, the use of the He-Ne laser alone showed a favorable effect on seedling growth compared with the control.

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