Effects of Cu2+ on Wheat Seedlings Exposed to Enhanced Ultraviolet-B Radiation


To explore the wheat seedling development and physiological responses under copper contamination and enhanced ultraviolet-B (UV-B) irradiation, 10 mg·L-1 CuCl2 solution was irrigated to Triticum aestivum L. cv. Linyuan 2069 one day after germination with or without ultraviolet-B (10.08 kJ m-2·d-1) light exposure, respectively. The results showed that Cu2+ and UV-B caused various adverse effects on wheat seedling development. Cu2+ hindered root development by significantly reducing root number, while UV-B dwarfed seedling height and decreased the leaf length. Chlorophyll content and activity of ATPase in thylakoid membrane of wheat leaves dropped significantly under enhanced UV-B while the activity of ATPase in plasma membrane of seedling root was significantly decreased in Cu2+ group. Relative electric conductivity of leaves significantly increased in both Cu2+ and UV-B groups, so did the biomass. We also observed that combined Cu2+ and UV-B showed more adverse effects on wheat seedlings than either of them alone except for root growth.

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Yang, L. , Wang, Z. , Hou, Y. , Han, R. and Sun, Y. (2014) Effects of Cu2+ on Wheat Seedlings Exposed to Enhanced Ultraviolet-B Radiation. American Journal of Plant Sciences, 5, 3060-3065. doi: 10.4236/ajps.2014.520322.

Conflicts of Interest

The authors declare no conflicts of interest.


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