Investigation of Physiochemical Characteristics of Wild Fruits and Berries from the Walnut-Fruit Forests of Southern Kyrgyzstan
Jamila Smanalieva1, Janyl Iskakova2, Zhyldyzai Ozbekova1, Zhyldyz Oskonbaeva2, Dietrich Darr3
1Kyrgyz-Turkish Manas University, Food Technology, Kyrgyzstan
The physicochemical properties and nutritional value of wild fruits and berries commonly growing in the walnut-fruit forests of southern Kyrgyzstan were determined to evaluate the capacity for use in the food processing industry. The investigated species were selected based on their reported nutritional aspects and medical properties and included apple (Malus sieversii var. kirgizorum), barberry (Berberis oblonga), cherry-plum (Prunus divaricata black, red, yellow), dog-rose (Rosa canina), hawthorn (Crataegus songorica), pear (Pyrus korshinskyi), and sea buckthorn (Hippophae rhamnoides). The fruits were collected from the natural walnut-fruit forests in the communities of Arslanbob (N 41°22'8.33”, E 72°3'45.974”, Altitude: 1300 m) and Kyzyl-Unkur (N 41°18'20.903”, E 72°57'48.209”, Altitude: 1466 m) in September 2017. The nutritional value of the samples was determined in terms of moisture, carbohydrates, alimentary fiber, vitamin С, ash, рН, titratable acidity, total polyphenols (TPC), total antioxidants, and total anthocyanins. The results of the analysis showed that the investigated fruits and berries have a moisture content ranging between 59.52% (Berberis oblonga) and 85.14% (Malus sieversii var. kirghisorum), carbohydrates ranging from 0.50% (Hippophae rhamnoides) to 10.29% (Pyrus korshinskyi), alimentary fiber ranging from 0.73% (Prunus divaricata yellow) to 13.19% (Berberis oblonga), vitamin С ranging between 7.39 mg/100 g (Prunus divaricata yellow) and 492.35 mg/100 g (Berberis oblonga), and ash content ranging between 0.30% (Malus siversii var. kirghisorum) and 2.70% (Rosa canina, Berberis oblonga). Among all the samples analyzed, the Berberis oblonga revealed the highest TPC at 2578 mg gallic acid equivalents/L followed by Rosa canina (2144 mg GAE/L). Between the samples, the lowest TPC value was found for Prunus divaricata yellow (611 mg GAE/L). All the studied fruits and berries can serve as a good source of bioactive compounds in the human diet. From the view of the phenolic content and antioxidant activity, barberry can be regarded as a good raw material for the production of healthy and/or functional foods.
Keywords: Berries, fruits, kyrgyzstan, physio-chemical properties, total anthocyanins, total antioxidants, total polyphenols, walnut-fruit forest
Contact Address: Jamila Smanalieva, Kyrgyz-Turkish Manas University, Food Technology, Prospekt Mira 56, 720042 Bishkek, Kyrgyzstan, e-mail: jamila.smanalievagmail.com