Naslov
Polyphenol content, profile and distribution in old, traditional apple varieties

Autori
Jakobek, Lidija ; Ištuk, Jozo ; Buljeta, Ivana ; Voća, Sandra ; Šic Žlabur, Jana ; Lesičar, Jasmin ; Skendrović Babojelić, Martina ;

Izvornik
Croatian Journal of Food Science and Technology (1847-3466) 12 (2020), 1; 110-117

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
UV/Vis spectrum ; flavonols ; flavan-3-ols ; phenolic acids ; anthocyanins ; dihydrochalcones ;

Sažetak
Apples are an important source of polyphenols in the human diet. They have also shown many potentially beneficial effects on human health. Old, traditional apple varieties grown in the past could also be valuable varieties but there is little known of their polyphenolic compounds and characteristics in general. The aim of this study was to collect 25 old, traditional apple varieties, to determine their polyphenolic profile and the amounts of total polyphenols in the peel and flesh, and to compare them with a commercial variety. Some of those varieties have never been studied before to the best of our knowledge ('Mašanka', 'Bobovac', 'Batulenka', 'Krastavka'). Total polyphenols were determined by using the Folin-Ciocalteu method and individual polyphenol identification was done by using an RP-HPLC. Flesh contained 170 to 941 mg kg-1 fresh weight (FW) of total polyphenols, and peel 931 to 3791 mg kg-1 FW. In comparison to the commercial variety, the peel of all old varieties had higher polyphenol content while the flesh of only some old varieties was richer in polyphenols. Principal component analysis showed possible clustering. Eighteen individual polyphenols were distributed in apple peel and flesh. Dominant polyphenol subgroups in the peel were flavonols (18 to 80 %) and flavan-3- ols (6 to 66 %), and in the flesh phenolic acids (41 to 85%) and flavan-3-ols (3-49 %).

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija), Prehrambena tehnologija

POVEZANOST RADA