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2 . 2021

Nutrients of fresh strawberries and products of its processing taking into account varietal characteristics

Abstract

In the context of a deficiency of some essential nutrients in the diet of the majority of Russian population, studies aimed at evaluation of the accumulation of nutrients in plant foods that determine the nutritional value and contribute to the improvement of the nutritional structure of the human diet are relevant.

The aim of this work was to evaluate content of macro- and micronutrients that determine nutritional value in strawberries, taking into account varietal characteristics, and to assess its opportunity to improve the structure of human nutrition when eaten fresh and in processed products.

Material and methods. The study included 3 varieties of strawberries bred by the Institute and 10 varieties of foreign breeding of different ripening periods, which are most common in industrial plantings when cultivated in the south of Russia. When conducting a chemical-technological assessment of strawberries harvested over three years (2017—2019), the following was determined: soluble solids; organic acids, sugars, vitamin C, amino acid composition, mineral substances; catechins, polyphenols, anthocyanins, leuco-anthocyanins, pectin substances; aromatic substances, firmness of berry pulp.

Results. Strawberries of different varieties differ from each other not only in technical parameters (shape, size, color, hardness), but also in biochemical characteristics (content of carbohydrates, vitamins, minerals, etc.). Strawberries accumulate 7.8—11.0% soluble solids, 5.9—8.3% — sugars (which are mainly represented by glucose (2.16—2.92%) and fructose (2.29—2.98%); 0.6—0.8% — pectins; 0.8—1.5% — acids (mainly citric acid). Strawberries are a source of vitamin C, which content in the studied varieties ranged from 48.8 (Asia variety) up to 67.8 mg/100 g (Marmolada variety); catechins varied in the range 43.2—108.8 mg per 100 g, anthocyanins — 51.5—90.0 mg/100 g, leuco-anthocyanins — 92.3—166.1 mg/100 g. The mineral composition is characterized by a low content of minerals (in 100 g:potassium — 75.8—123.0 mg, calcium — 22.3—30.2 mg, magnesium — 6.3—10.3 mg) and a high accumulation of iron (0.85—1.34 mg/100 g). The presence of a complex of biologically active substances determines the demand for strawberries both for fresh consumption and as a raw material for many types of processing and freezing. As a result of the conducted studies of the chemical composition of strawberries, taking into account the technological requirements for this raw material (content of soluble solids, sugars, vitamins), the following varieties are recommended for processing: Marmolada, Molling Pandora, Florence, Elsanta, Tair. Berries of the following varieties are suitable for freezing: Marmolada, Alba, Arosa, Nelly, Onda, as the most fully preserving the original quality of berries, having a low juice yield and a high tasting rating.

Conclusion. On the basis of the comprehensive studies of the quality of berries, promising varieties of strawberries were identified for cultivation in the south of Russia, characterized by high nutritional value, excellent taste, usage in food consumption both fresh and frozen, as well as in the production of canned products, including obtaining foodstuffs for functional purposes.

Keywords:strawberrys, nutritional value, vitamins, minerals, trace elements, canned products, freezing

Funding. The work was carried out within the framework of the state assignment (budget project No. 0689-2019-0009 “To identify the patterns of the influence of physical, chemical and biotechnological methods of influence on fruit, berries and vegetable raw materials and to develop multivariate dynamic models for managing biochemical, microbiological and technological processes in the creation of innovative resource-saving technologies for storage and processing of fruits, berries and vegetables”).

Conflict of interests. The authors declare no conflict of interest.

For citation: Prichko T.G., Droficheva N.V., Smelik T.L., Karpushina M.V. Nutrients of fresh strawberries and products of its processing taking into account varietal characteristics. Voprosy pitaniia [Problems of Nutrition]. 2021; 90 (2): 117-27. DOI: https://doi.org/10.33029/0042-8833-2021-90-2-117-127 (in Russian)

References

1. Tutel’yan V.A, Velkov A.I., Razumov A.N., et al. Scientific foundations of healthy nutrition. Moscow, 2010: 816 p. (in Russian)

2. Prichko T.G., Germanova M.G., Bolovik T.L. Commercial qualities and chemical composition of strawberries of the SKFNCSVV selection. Plodovodstvo i vinogradarstvo Yuga Rossii (elektronniy zhurnal) [Fruit Growing and Viticulture of South Russia (electronic journal)]. 2019; 58 (4): 104–13. DOI: http://doi.org/10.30679/2219-5335-2019-4-58-104-113 (in Russian)

3. Podorozhny V.N., Gorelikova O.A. Criteria and parameters for the selection of strawberry varieties for intensive technologies of its cultivation in the Krasnodar Territory. Plodovodstvo i yagodovodstvo Rossii [Fruit and Berry Growing in Russia]. 2014; 40 (2): 176–83. (in Russian)

4. Fecka I., Nowicka A., Sokół-Łętowska A. The effect of strawberry ripeness on the content of polyphenols, cinnamates, L-ascorbic and carboxylic acids. J Food Compos Anal. 2021; 95: 103669. DOI: http://doi.org/10.1016/j.jfca.2020.103669.

5. Lukyanchuk I.V., Zhbanova E.V. Biologically active complex of strawberry fruits. Plodovodstvo [Fruit Growing]. 2017; (29): 150–7. (in Russian)

6. Prichko T.G., Yacovenko V.V., Germanov M.G. Grade differences in the chemical composition of strawberry berries of the Krasnodar Territory. Plodovodstvo i yagodovodstvo Rossii [Fruit and Berry Growing in Russia]. 2011; XXVII: 209–19. (in Russian)

7. Shan C., Zhang H., Zhang Y., Zhou H. Lanthanum nitrate regulates the content of vitamin C through its biosynthesis, regeneration and degradation in the fruit of strawberry. Scientia Horticulturae. 2017; 224: 102–8. DOI: http://doi.org/10.1016/j.scienta.2017.06.003

8. Nowicka A., Kucharska A., Sokol-Letowska A., Fecka I. Comparison of polyphenol content and antioxidant capacity of strawberry fruit from 90 cultivars of Fragaria ´ ananassa Duch. Food Chem. 2019; 270: 32–46. DOI: http://doi.org/10.1016/j.foodchem.2018.07.015

9. Pennington J., Fisher R. Food component profiles for fruit and vegetable subgroups. J Food Compos Anal. 2010; 23: 411–8. DOI: http://doi.org/10.1016/j.jfca.2010.01.008

10. Asensi-Fabado M., Munne-Bosch S Vitamins in plants: occurrence, biosynthesis and antioxidant function. Trends Plant Sci. 2010; 15 (10): 582–91. DOI: http://doi.org/10.1016/j.tplants.2010.07.003

11. Prichko T.G., Chalaya L.D., Germanova M.G., Smelik T.L. Modification procedure for determining common polyphenols in fruits, berries and processing products. In: Methodological and Analytical Support of Horticulture Research: Collection of scientific papers. Krasnodar, 2010: 260–3. (in Russian).

12. Determination of pectin substances by colorimetric method. In: Method of State Variety Testing of Agricultural Crops. Moscow: Kolos, 1988: 115–20. (in Russian)

13. Analytical determination of amino acids/Modern methods of isolation and research of biologically active substances and microorganisms: monograph. In: A.V. Brykalov, Yu.F. Yakuba, et al. (eds). Krasnodar: KubGAU, 2013: 40–6. (in Russian)

14. Gas-chromatographic determination of volatile components of products/Modern methods of isolation and research of biologically active substances and microorganisms: monograph. In: A.V. Brykalov, Yu.F. Yakuba, et al. (eds). Krasnodar, KubGAU, 2013: 60–79. (in Russian)

15. Yakuba Yu.F., Kuznetsova A.P. Methods of determining the concentration of cations and anions, phenolic compounds in alcohol-containing solutions using the method of high-efficiency capillary electrophoresis. In: Methodological and Analytical Support of Research on Horticulture: Collection of scientific papers. Krasnodar, 2010: 300 p. (in Russian)

16. Methodological and Analytical Support for Horticulture Research. In: SKZNIISiV; editorial: E.A. Egorov, et al. Krasnodar, 2010: 310 p. (in Russian)

17. Prichko T.G., Germanova M.G., Bolik. T.L. Use of strawberries in the technology of production of new types of canned products of functional purpose. Plodovodstvo i vinogradarstvo Yuga Rossii (elektronniy zhurnal) [Fruit Growing and Viticulture of South Russia (electronic journal)]. 2018; 52 (4): 85–95. (in Russian).

18. Prichko T.G., Germanova M.G. Chemical and technological assessment of strawberry varieties of different maturation dates. Journal Vestnik RASKhN [Bulletin of the RASKhN]. 2011; (6): 78–81. (in Russian).

19. Kahkonen M.P., Hopia A.I., Heinonen M. Berry phenolics and their antioxidant activity. J Agric Food Chem. 2001; 49 (8): 4076–82. DOI: http://doi.org/10.1021/jf010152t

20. Akimov M.Y., Zhbanova E.V., Makarov V.N., Perova I.B., et al. Nutritional value of fruits of promising varieties of strawberries. Voprosy pitaniia [Problems of Nutrition]. 2019; 88 (2): 64–72. (in Russian)

21. Akimov M.Yu., Zhbanova E.V., Luk’yanchuk I.V., Lyzhin A.S., Mironov A.M. Characteristics of the strawberry varietal stock by chemical composition and antioxidant value of fruits in the conditions of the Central chernozem region. Vestnik KrasGAU [Bulletin of the KrasGAU]. 2019; 1 (142): 56–60. (in Russian)

22. Kudryasheva A.A. New biotechnologies and natural biocorrectors. Moscow: Pishchepromizdat, 2007: 384 p. (in Russian)

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CHIEF EDITOR
CHIEF EDITOR
Viktor A. Tutelyan
Full Member of the Russian Academy of Sciences, Doctor of Medical Sciences, Professor, Scientific Director of the Federal Research Centre of Nutrition, Biotechnology and Food Safety (Moscow, Russia)

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