Antifungal activity of eugenol against Botrytis cinerea

作者：Wang Chunmei; Zhang Jie; Chen Hao; Fan Yongjian; Shi Zhiqi^*

来源：Tropical Plant Pathology, 2010, 35(3): 137-143.

DOI：10.1590/s1982-56762010000300001

• natural compound
• fungal diseases
• mode of action
• plasma membrane

The antifungal properties of eugenol were tested against ten plant pathogenic fungal species and detailed studies were conducted regarding in vitro activity of eugenol on Botrytis cinerea. The EC(50) value of eugenol on mycelial radial growth of B. cinerea was 38.6 mu g/mL; however, eugenol had no bioactivity against conidia germination. B. cinerea hyphae treated with eugenol showed strong propidium iodide fluorescence in the cytosol. Eugenol increased the concentration of potassium ion and cellular materials in the medium. Furthermore, light and scanning electron microscopy observations on hyphae exposed to eugenol revealed considerable morphological alterations in hyphae, such as cytoplasmic coagulation, vacuolation, and hyphal shriveling. Eugenol induced the generation of H(2)O(2) and increased free Ca(2+) in the cytoplasm. These results strongly support the idea that the antifungal activity of eugenol is due to membrane binding and permeability alteration, leading to destabilization and disruption of the plasma membrane.

• 出版日期2010-6
• 单位江苏省农业科学院