Inhibitive Mechanisms of Two Silicon Compounds
on Powdery Mildew of Melon
GUO Yu-rong;LIU Lei;ZHAO Hua;CHEN De-rong;BI Yang
【期刊名称】《农业科学学报（英文版）》 【年(卷),期】2005(004)005
【摘要】Seedlings of Yujinxiang melon were used to investigate the effect and inhibitive mechanism of sodium silicate and nanosized silicon oxide on powdery mildew. The results showed that the severity of powdery mildew on melon seedlings was lowered significantly by treatment with either of the two silicon compounds, although the effect of sodium silicate was more powerful than silicon oxide. Application of sodium silicate to the seedlings caused significant increases in the activity of peroxidase (POD) and of 3-1,3-glucosidase (GLU), both enzymes are known to be associated with the disease defence systems of plants. SEM-EDX analysis of sodium silicate-treated leaves of the melon seedlings showed an elevated level of silicon deposit at stomata and epidermis. Treatment with nanosized silicon oxide also resulted in a similar increase in silicon deposit, but the treatment did not cause a significant increase in POD activity. 【总页数】6页(362-367)
【关键词】Cucumis melon L.;Powdery mildew;Sphaerotheca cucurbitae;Silicon;SEM-EDX;POD;GLU
Inhibitive Mechanisms of Two Silicon Compounds on Powdery Mildew of Melon
