Phenolic compounds in apple leaves after infection with apple scab
2011
Mikulic Petkovsek, M., University of Ljubljana (Slovenia). Agronomy Dept. | Slatnar, A., University of Ljubljana (Slovenia). Agronomy Dept. | Stampar, F., University of Ljubljana (Slovenia). Agronomy Dept. | Veberic, R., University of Ljubljana (Slovenia). Agronomy Dept.
Leaves of the scab-susceptible apple cultivar Golden Delicious were harvested from May to August 2008 and 2009. Some leaves were healthy and some infected with Venturia inaequalis. The phenolic compounds were analysed in healthy leaves, infected leaves and in the scab spot tissue. In comparison with healthy leaves, the infected leaves showed higher concentrations of hydroxycinnamic acid, flavanols and phloridzin, and lower concentrations of procyanidins, quercetins and phloretin. The total amount of phenolic compounds in the infected tissue was 10 to 20 % higher than in the healthy leaves. Accumulation of phenolic compounds is a post-infection response.
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