外源低聚糖、水杨酸诱导杨树抗病生理机制的研究  

Physiological Mechanism of Salicylic Acid and Oligosaccharides Eliciting Resistance of Poplar to Melampsora larici-populina

作　　者：徐擎[1] 胡景江[2] 薛盼盼[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨陵72100 [2]西北农林科技大学生命科学学院,陕西杨陵72100

出　　处：《西北林学院学报》2011年第2期119-123,共5页Journal of Northwest Forestry University

基　　金：长江学者和创新团队发展计划(IRP0748)

摘　　要：以杨树离体叶片为材料,研究了水杨酸、低聚糖对杨树抗病性的诱导作用。结果表明,水杨酸、低聚糖以及他们共同作用对杨树PAL、木质素、β-1,3-葡聚糖酶、几丁质酶、HRGP具有明显的诱导作用。水杨酸浓度为50~100 mg.L-1时诱导效果最显著（P〈0.05）,低聚糖浓度为10 mg.L-1时诱导效果最佳（P〈0.05）,水杨酸的诱导效率高于低聚糖,二者交叉诱导的效率又高于各自单独诱导。接种试验进一步证明经激发子诱导之后杨树离体叶片的抗病性增强,明显抑制了夏孢子堆的生长,延长了潜育期。The induction of the elicitor to disease resistance of poplar was studied with the detached leaves.The results showed that salicylic acid,oligosaccharides and the co-induction could induce a significant increase in PAL,Lignin,β-1,3-glucanase,chitinase and HRGP.Optimal effects were achieved when the concentrations of salicylic acid and oligosaccharides were 50~100 mg·L-1 and 10 mg·L-1,respectively.The inducing efficiency of salicylic acid was better than oligosaccharides,their co-induction efficiency was the best of all.The inoculation test on poplar detached leaves further proved that the disease resistance was enhanced,and poplar leaves induced notably restrained the growth of sporulation,the incubation period was extended.

关 键 词：水杨酸 低聚糖 杨树 杨栅锈菌 抗病性 

分 类 号：S763.01[农业科学—森林保护学]