عنوان مجله
|
International Journal of Horticultural Science and Technology
|
کلیدواژهها
|
Total phenols, flavonoids, anthocyanin, ascorbic acid, antioxidant, quince.
|
چکیده
|
This study aimed to determine the amount of flavonoids, anthocyanins, total phenolic
compounds, ascorbic acid and antioxidant activity of the peel and pulp of the quince (Cydonia
oblonga Mill.) in the polar and nonpolar sub-fractions of methanol extracts with two
extraction methods, Soxhlet and microwave. The antioxidant properties were assessed by the
ability to quench the stable free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing
antioxidant power (FRAP) and β-carotene bleaching assays. The results showed that the
Soxhlet method extracted higher amount of the phytochemicals. In the DPPH system, the
highest radical scavenging activity was seen by the polar sub-fraction of the methanol extract
in the peel of quince fruit (IC50=52±7.3 µg/mL). Among all the extracts analyzed, the polar
sub-fraction of the peel extract exhibited a significantly higher total flavonoid (62.33±3.1 mg
CTE/100 g), anthocyanin (1.54±0.24 μg C-3-GE/100 mg fresh weight), phenolic content
(108.14 µg GAE/mg) and antioxidant activity than other samples with Soxhlet extraction
method. Fruit has a number of bioactive ingredients and many of them were concentrated in
the peel of the fruit rather than the flesh. Therefore, enjoy the benefits that unpeeled fruit
offers! The present study revealed that the peel of quince fruit has higher phytochemicals and
antioxidant properties when compared to the pulp.
|