Antifungal potential and biochemical effects of monoterpenes and phenylpropenes on plant

Plant Protection Science

Gehan I. Kh. Marei¹ 

关键词: natural products;    antifungal activity;    enzyme inhibition;   

DOI  :  10.17221/9/2017-PPS

学科分类：农业科学（综合）

来源: Czech Academy of Agricultural Sciences

【 摘 要 】

To develop new natural fungicides, six monoterpenes and two phenylpropenes were tested for their antifungal activity against eight plant pathogenic fungi. The results of the mycelial growth inhibition assay showed that trans-cinnamaldehyde was the most potent compound against the eight tested fungi with EC₅₀ values ranging between 0.75 and 3.19 mg/l. This compound caused the higher mycelial growth inhibition than carbendazim. Furthermore, (–)-menthone exhibited strong antifungal activity against Alternaria solani (EC₅₀ = 9.31 mg/l), Penicillium digitatum (EC₅₀ = 16.14 mg/l), and Rhizoctonia solani (EC₅₀ = 24.69 mg/l). Likewise, eugenol showed potent antifungal activity against P. digitatum, R. solani, Fusarium solani, and A. solani, whereas EC₅₀ values were less than 30.0 mg/l. In a separate experiment, trans-cinnamaldehyde, p-cymene, eugenol, and (–)-menthone were evaluated for their inhibitory effects on pectin methyl esterase and cellulase. The tested compounds exhibited the pronounced inhibition of enzyme activities with trans-cinnamaldehyde being the most potent inhibitor for both enzymes.

【 授权许可】

CC BY