Seasonal Variation of the Qualitative and Quantitative Composition of Phenolic Compounds in Malus domestica Leaves
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Apple (Malus domestica Borkh.) is one of the most widely grown and cultivated fruit trees. Studies on the quantitative and qualitative composition of phenolic compounds in healthy apple leaves and leaves with scabs have been conducted to evaluate the influence of apple scab (Venturia inaequalis (Cooke) Wint.) on the biosynthesis of phenolic compounds [1, 2]. However, there is still a lack of studies of apple leaves, which would allow for their use in medical practice, pharmacy, and food industry.
The goal of this study was to determine the quantitative and qualitative compositional variability of flavonoids and phenolic acids in apple leaf samples obtained from apples (Malus domestica Borkh.) grown under Lithuanian climatic conditions during the vegetation period.
We studied the leaves of the “Ligol” apple cultivar during the vegetation period. Phenolic compounds of different groups were identified in ethanol extracts of the studied apple leaves, including quercetin glycosides,...