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

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DOI: 10.4236/ajps.2014.520322    2,283 Downloads   2,666 Views   Citations

ABSTRACT

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.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

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.

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