NUTRIENTS CONTENT IN FRUITS OF VARIETIES AND HYBRIDS OF GUELDER ROSE (VIBURNUM OPULUS L.) IN CONDITIONS OF THE WESTERN SIBERIAN SOUTH
2022
Irina D. Borodulina | Inessa V. Ershova
Guelder rose (V. opulus L., 1753) is a rare garden crop widespread throughout Russia. It is a valuable food and medicinal raw material due to its rich chemical composition. It contains biologically active phenolic compounds, pectin substances, triterpenoids, polysaccharides, carbohydrates, organic acids, and macro- and micro-elements. The study aimed to investigate the content and variability of soluble solids (SS) and sugars in fruits of V. opulus L. in the conditions of the South of Western Siberia. The research objects are fruits of V. opulus L. of 2 varieties (Taezhnye Rubiny and Avrora) and 15 hybrids. The authors employ the Taezhnye Rubiny variety as a control. The SS content has been determined by the refractometric method and the mass content of sugars – by direct titration of an aqueous extract. The authors calculate Selyaninov’s hydrothermal coefficient (HTC) to characterize the growing season. The limits are determined for the accumulation of SS (from 10.2% to 18.2%) and sugars (from 7.3% to 10.0%) and the variability of these features (14% and 10%, respectively). The number of genotypes with a stable accumulation of SS identified over the years is 82%, and that with high sugar content (8.6%–10.0%) is 35%. The analysis reveals an average adverse correlation between HTC and the accumulation of SS (r=-0.62) and sugars (r=-0.34) in fruits and a strong dependence of these biochemical features on HTC in control (r=0.93, r=0.95).
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