Biologia plantarum 55:725, 2011 | DOI: 10.1007/s10535-011-0176-6
Phenolic compounds in apple leaves after infection with apple scab
- 1 Agronomy Department, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
Leaves of the scab-susceptible apple (Malus domestica) cultivar Golden Delicious were harvested from May to August 2008 and 2009. Some leaves were healthy and some infected with fungus Venturia inaequalis. The phenolic compounds were analysed in healthy leaves, infected leaves and in the scab spot tissue. In comparison to healthy leaves, the infected leaves showed higher contents of hydroxycinnamic acid, flavanols and phloridzin, while lower contents on 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, and probably their further transformation is a prerequisite for plant resistance.
Keywords: Venturia inaequalis; Malus domestica; hydroxycinnamic acids; dihydrochalcones; flavonoids
Received: January 20, 2010; Accepted: May 21, 2010; Published: December 1, 2011 Show citation
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