Effects of reducing Mn2+锛Cu2+ and Zn2+ concentrations in nutrient solution on SOD activity in grafted cucumber seedling leaves under cold stress | 浣ュ绘恫Mn2+锛Cu2+ Zn2+ 娴搴疯杩榛骞艰SOD娲绘х褰卞
2011
Li Tao, Yantai Academy of Agricultural Sciences, Yantai (China) | Gao Junjie, Taian Bureau of Agriculture, Taian (China) | Yu Xianchang, Chinese Academy of Agricultural Sciences, Beijing (China), Institute of Vegetables and Flowers
[Objective] The research aimed to study the effects of reducing the concentrations of Mn2+, Cu2+ or Zn2+ in nutrient solution on the contents of Mn, Cu and Zn of grafted cucumber leaves as well as on the SOD and isozymes activities and the rate of electrolytic leakage under cold stress. [Method] Nutrient solution containing low concentrations of Mn2+, Cu2+ or Zn2+ were used for cultivating the grafted cucumber seedlings for the cold treatment. [Result] The results indicated that educing the concentrations of Mn2+, Cu2+ or Zn2+ in nutrient solution had declined the SOD activities in grafted cucumber leaves and increased the rates of electrolytic leakage. Mn2+ had shown the maximum influences, followed by Cu2+, and Zn2+ had shown the minimum influences. [Conclusion] Cold resistance of cucumber can be changed by changing the contents of Mn2+, Cu2+ or Zn2+ in nutrient solution.
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