南方农业学报2011，Vol.42Issue(5)：488-491,4.
油菜素内酯对苦瓜幼苗抗冷性的影响
Effect of brassinosteroid on improving chilling resistance of bitter gourd seedlings
摘要
Abstract
[Abstract]The objective of the current study was to screen the optimum concentration of brassinosteroid (BR) to improve chilling resistance of bitter gourd seedlings in order to lessen the losses caused by low temperature stress.[Method]The plant growth indices, metabolites, viz, MDA and soluble sugar content, relative conductivity, and activities of peroxidase (POD) and superoxide dismutase (SOD) enzymes in the leaves were investigated in bitter gourd seedlings treated with different concentrations of BR ( 10-4,10-3,10-2,10-1 and 10 mg/L) under the conditions of low temperature (8.0±0.5℃)stress for 72 h, CK1 (normal temperature) and CK2 (low temperature stress) were set as controls. [Result]Different concentrations of BR treatment promoted the growth of bitter gourd seedlings and decrensed the chilling effects (chilling index)by increasing the fresh weight, the contents of chlorophyll, soluble protein, proline, and the activities of POD and SOD enzymes, reducing the accumulation of MDA and decreasing the relative conductivity significanfiy, compared to CK2.[Conclusion]BR treatment with different concentrations could significantly enhance chilling resistance of bitter gourd seedlings, however, the best seedlings growth was observed in the treatment 10-2 mg/L concentration of BR.关键词
苦瓜/油菜素内酯/抗冷性/影响Key words
bitter gourd/ brassinosteroid (BR)/ chilling resistance/ effect分类
农业科技引用本文复制引用
黄玉辉,罗海玲,陈小凤..油菜素内酯对苦瓜幼苗抗冷性的影响[J].南方农业学报,2011,42(5):488-491,4.基金项目
广西科学基金项目(桂科基0991018) （桂科基0991018）
广西农业科学院基本科研业务专项项目[200914(基)] （基）
