Characterisation of Sorbus domestica L. Bark, Fruits and Seeds: Nutrient Composition and Antioxidant Activity

Boris Majić1,2, Ivana Šola1*, Saša Likić1, Iva Juranović Cindrić2 and Gordana Rusak1

1Department of Biology, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia
2Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 
HR-10000 Zagreb, Croatia

Article history:
Received November 19, 2014
Accepted June 12, 2015

Key words
service tree, food analysis, macroelements, microelements, phenolics, flavonoids, 
tannins, antioxidant activity

The aim of this work is to assess the nutritional value of service tree (Sorbus domestica L.) bark, fruit exocarp and mesocarp, and seeds by establishing the levels of macro- and microelements, total phenolics, flavonoids and tannins. Our results revealed that all of the tested service tree samples were rich in potassium. Bark was the best source of calcium and zinc, while seeds were the best source of magnesium. Compared to the bark and seeds, fruit exocarp and mesocarp contained signifi cantly lower amounts of these three elements. Immature exocarp and bark contained the highest amounts of total phenolics and showed the highest antioxidant activity. Maturation significantly decreased the amount of total phenolics in fruits, as well as the antioxidant activity of total phenolics and total tannins from exocarp, but not from mesocarp. Exocarp was the richest in total flavonoids. Based on the obtained data, we have concluded that the under-utilised species S. domestica L. could serve as an important source of mineral elements and antioxidants in the human diet.

*Corresponding author:  email3 
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