Changes in post-disease amounts of some phenolic compounds in different Vitis species
Powdery and downy mildew diseases are one of the most important diseases limiting viticulture. There are some changes in the metabolism of plants after these diseases. These include changes in the amounts of some phenolic substances or compounds. There are different explanations as to whether these changes are related to disease resistance. In this study, some phenolic substance changes were evaluated before and after the both diseases. Total antioxidant activity, total phenolic substance, rutin and chlorogenic acid changes were studied for two years with Vitis varieties or genotypes belonging to different species. Especially after both diseases, significantly increase in total phenolic substance and antioxidant activity amounts attracted attention. Especially after the powdery mildew, it was seen that the increases were more prominent. Changes in the amount of rutin and chlorogenic acid can vary depending on the cultivar or genotype. These results suggest that amount of the phenolic compounds may increase or decrease in post-disease, depending on the phenolic compound and cultivar/genotype.
Atak, A., Göksel, Z. and Söylemezoğlu, G. (2020). Changes in post-disease amounts of some phenolic compounds in different Vitis species. Acta Hortic. 1276, 31-40
downy mildew, powdery mildew, leaf extract, resistance, phenolics