Effects of Eugenol and TYLCV Inoculation on Activities of Chitinase and β- 1,3- Glucanase in Tomato

The effects of spraying eugenol and inoculating tomato yellow leaf curl virus(TYLCV) on the activities of chitinase and β-1,3-glucanase in the leaves of tomato cultivar Jiangsu 14were investigated. The results showed that the activites of chitinase and β-1,3-glucanase in tomato leaves increased significantly within 96 h after spraying 200 μg / mL eugenol. Inoculating TYLCV further increased the activities of the above two enzymes in tomato leaves after being induced by eugenol. The activities of chitinase and β-1,3-glucanase in plants inoculated with TYLCV were higher than those in un-inoculated plants. The above results indicated that eugenol could induce the resistance of tomato to TYLCV by enhancing the activities of chitinase and β-1,3-glucanase.