THE EVALUATION OF THE CARBOHYDRATE CONTENT AND TITRATABLE ACIDITY IN THE FRUITS OF THREE CULTIVARS OF AUTUMN OLIVE (ELAEAGNUS UMBELLATA THUNB.), INTRODUCED IN THE REPUBLIC OF MOLDOVA

  • Ion Roșca Alexandru Ciubotaru National Botanical Garden (Institute), Republic of Moldova
  • Elisaveta Onica Alexandru Ciubotaru National Botanical Garden (Institute), Republic of Moldova
  • Aliona Glijin “Alexandru Ciubotaru” National Botanical Garden (Institute), Republic of Moldova
  • Alina Cutcovski-Muștuc “Alexandru Ciubotaru” National Botanical Garden (Institute), Republic of Moldova
  • Vitalie Mîțu “Alexandru Ciubotaru” National Botanical Garden (Institute), Republic of Moldova
  • Natalia Onica “Alexandru Ciubotaru” National Botanical Garden (Institute), Republic of Moldova
Keywords: Elaeagnus umbellata, 'Amoroso', ?Fortunella?, ?Sweet ?n? Sour?, autumn olive, carbohydrates, titratable acidity.

Abstract

The article presents the results of the quantitative analysis of carbohydrates and the level of titratable acidity in the dried and frozen fruits of three taxa of Elaeagnus umbellata Thunb. ('Amoroso', ˈFortunellaˈ and ˈSweet ˈnˈ Sourˈ), which have been introduced in the collection of “Alexandru Ciubotaru” National Botanical Garden (Institute) in 2018. The assessment of the carbohydrate content has revealed values in the range of 7.95% (ˈSweet ˈnˈ Sourˈ) and 8.32% ('Fortunella') in frozen fruits and in the range of 8.53% ('Amoroso') and 8.88% (ˈSweet ˈnˈ Sourˈ) in dried fruits. The results of the study have shown that the bioaccumulation of carbohydrates is determined more by the type of storage of fruits (the maximum difference is 11.7%, in the cultivar ˈSweet ˈnˈ Sourˈ), than by cultivar (the maximum difference is 4.6 % in frozen fruits and 4.1 % – in dried fruits). The titratable acidity in frozen fruits of E. umbellata recorded maximum values (1.216 % malic acid, 1.162 % citric acid and 1.361 % tartaric acid) in the cultivar 'Amoroso' and minimum (0.827 % malic acid, 0.790 % citric acid and 0.926 % tartaric acid) – in the cultivar ˈSweet ˈnˈ Sourˈ. The same tendency was observed in dried fruits. The fruits of the cultivar 'Fortunella' recorded an average level of titratable acidity, the values being closer to those of the cultivar 'Amoroso'. The obtained data allowed us to conclude that the fruits of the three researched taxa possess optimal values of carbohydrates and titratable acidity, providing balanced organoleptic properties, and the dried fruits recorded significantly higher values of the analysed biochemical parameters in all the studied cultivars.

Published
2023-07-31
Section
Research articles