Alleviation of cadmium toxicity in cucumber (Cucumis sativus) seedlings by the application of selenium

• Sun, Hongyan ^[1] ; Wang, Xiaoyun ^[2] ; Wang, Yuna ^[1] ; Wei, Yiying ^[1] ; Wang, Guohui ^[1]
  1. [1] Taiyuan University of Science and Technology

     Taiyuan University of Science and Technology

     China

     
  2. [2] Institute of Shanxi Soil and Water Conservation, P. R. China
• Localización: Spanish journal of agricultural research, ISSN-e 2171-9292, ISSN 1695-971X, Vol. 14, Nº. 4, 2016
• Idioma: inglés
• Enlaces
  • Texto completo (pdf)
• Resumen

  • In the present study, the role of selenium in cadmium toxicity was investigated in cucumber seedlings by hydroponic experiments. The application of Se for cucumber exposed to Cd significantly reduced Cd accumulation in all tissues, elevated Cd-depressed chlorophyll content, and improved photosynthetic performance. External Se significantly reduced ·OH, H2O2 and malondialdehyde content. Exogenous Se balanced Cd-depressed elements (e.g., Se enhanced Cd-induced decreases in root Zn, leaf/stem/root Mn concentrations) and carbohydrate contents. External Se also significantly decreased the Cd-induced increases in Na+K+-, Ca2+Mg2+- and total ATPase activities, which recovered almost to control level. Results indicate that application of Se can alleviate Cd toxicity in cucumber seedlings by reducing Cd uptake and reactive oxygen species (ROS) accumulation, moreover protecting photosynthetic machinery from damaging, balancing elements and carbohydrate contents, and improving ATPase activities in cucumber.