【摘要】 利用大豆子叶法对人工合成的几种葡聚寡糖激发子及其衍生物的生物活性进行测定 ,比较其结构与活性之间的关系。研究证明 ,葡聚七糖的活性明显高于六糖 ,葡聚六糖及其衍生物的EC50 值高于葡聚七糖及其衍生物。葡聚七糖、葡聚六糖还原端附加烷基对其EC50 值均没有明显影响。葡聚寡糖多聚体的活性要高于单一葡聚寡糖。水杨酸七糖活性高于葡聚七糖更多还原

【Abstract】 Several synthetic glucosyl-oligosaccharides were tested for their biological activities to trigger the defense reactions on soybean cotyledons. The results indicated that glucohexaose and its derivants had the higher values of EC₅₀ on phytoalexin induction compared to glucoheptaoside and its derivants. Alkylation on the reducing end of these inducers could not eliminate their activities. Dimer of the glucosyl-oligosaccharide showed higher activity than that of its monomer and the activity of salicyl glucoheptaoside was higher than glucoheptaoside.更多还原