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Peculiarities of accumulation of photoprotective compounds by fruit of Siberian crabapple, Malus domestica Borkh. and their hybrids growing in conditions of Eastern Siberia

Rudikovskaya, Е.G., Dudareva, L.V., Shishparenok, А.А., Osipova, S.V., Stavitskaya, Z.O., Rudikovskii, А.V.
Scientia horticulturae 2019 v.253 pp. 303-308
Malus baccata, Malus domestica, anthocyanins, apples, ascorbic acid, bioactive compounds, carotenoids, climatic factors, crossing, fruits, genotype, glutathione dehydrogenase (ascorbate), hybrids, oxidation, quercetin, Siberia
This article presents data on the content of photoprotective compounds (carotenoids, anthocyanins, ascorbic acid and quercetin glycosides) in the peel of the apple of the Siberian crabapple (Malus baccata (L.) Borkh.), and its hybrids derived from crosses with M. domestica (F1, F2 and F3) grown under the climatic conditions of Eastern Siberia. In all the samples studied, cis-zeaxanthin proved to be a major carotenoid. Notably, M. domestica varieties had a relatively high content of anteroxanthin. According to the activity of accumulation of biologically active compounds, Siberian crabapple considerably exceeded all the studied genotypes, and a positive correlation (r = 0.77, P < 0.05) between the contents of anthocyanins and ascorbic acid was found in the peel of the fruit of hybrid forms. In the peel of the fruit of apple varieties, a negative correlation (r = −0.71, P < 0.05) between the contents of anthocyanins and quercetin glycosides was detected. The activity level of dehydroascorbate reductase suggests that a high content of ascorbic acid in the peel of Siberian apple is maintained by its reduction from oxidized forms.