Resistance of LaCl_3 to Oxidative Stress Induced by 2, 4-Dichlorophenoxy  

作　　者：贾艳侠 高永生 曾福礼 

机构地区：[1]School of Life Science, Lanzhou University, Lanzhou 730000, China

出　　处：《Journal of Rare Earths》2005年第2期240-244,共5页稀土学报（英文版）

基　　金：ProjectsupportedbytheNaturalScienceFoundationofGansuProvince(2001)

摘　　要：Cucumber seedlings were sprayed with different concentrations of LaCl_3 for 3 d continuously. After 7 d of this treatment, the plants were treated with 1200 mg·L^(-1) 2,4-dichlorophennoxy(2,4-D) for 24 h. The leaves were harvested and rinsed with 5 mmol·L^(-1) EDTA. The concentrations of photosynthetic pigments, soluble protein and metabolites related to oxidative stress and the activities of antioxidant enzymes in leaves were assayed. The results show that the treatment with appropriate concentration of LaCl_3 has resistant effect on oxidative stress induced by 2, 4-D. Proper concentration of LaCl_3 promotes the activity of antioxidant system in plants and alleviates the damage caused by 2, 4-D.Cucumber seedlings were sprayed with different concentrations of LaCl_3 for 3 d continuously. After 7 d of this treatment, the plants were treated with 1200 mg·L^(-1) 2,4-dichlorophennoxy(2,4-D) for 24 h. The leaves were harvested and rinsed with 5 mmol·L^(-1) EDTA. The concentrations of photosynthetic pigments, soluble protein and metabolites related to oxidative stress and the activities of antioxidant enzymes in leaves were assayed. The results show that the treatment with appropriate concentration of LaCl_3 has resistant effect on oxidative stress induced by 2, 4-D. Proper concentration of LaCl_3 promotes the activity of antioxidant system in plants and alleviates the damage caused by 2, 4-D.

关 键 词：cucumis sativus L. 2  4-D LaCl_3 oxidant stress resistant effect rare earths 

分 类 号：S642.2[农业科学—蔬菜学]