The total content of polyphenols and flavonoids in cherry varieties of Kazakhstan selection

Relevance. In general, phenolic compounds are aromatic compositions, where a benzene ring is associated with one or more hydroxide groups. All phenolic compounds are divided into groups by structure and fragment’s type. There are more 10 000 types of different phenolic compounds structures that are found in plants raw materials and food products. The studies covered in the article are relevant, both from the point of view of scientific novelty, and to substantiate the benefits of consuming cherries of new varieties of Kazakhstan breeding.

The purpose of the study is to analyze the content of polyphenols and flavonoids in the cherries of Kazakhstan selection.

Research objectives: to collect theoretical data, apply research methods to determinethe content of polyphenols and flavonoids in the laboratory, to draw relevant conclusions.

Methods. For the study of physico-chemical and chemical indicators of the total polyphenols and total flavonoids contents, following sweet cherry varieties of the Kazakhstan selection were considered: Aigerim, Lyazat and Merei. Following physico-chemical indicators were studied: solids content, total sugars and titratable acidity. It was found that among the considered sweet cherry sorts, the highest values had variety Lyazat, specifically in the chemical indicators: sugar-acid index, ascorbic acid (vitamin C) content, total polyphenols and total flavonoids contents.

Results. By the total polyphenols and flavonoids contents varieties Aigerim (866 μg/mL and 275 μg/mL), Lyazat(885 μg/mL and 290 μg/mL) and Merei (865 μg/mL and 255 μg/mL) are close to each other. In the considering relatively Lyazat, the Total polyphenols content, Aigerim and Merei have lowest data by 0.05% and 0.13%, respectively. Total flavonoids content of varieties values for Aigerim and Merei 0.05% and 0.22% — were also identified. In general, a review of all obtained data with the known values shows that indicators of the total polyphenols and flavonoids contents are with in the acceptable variations. 

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