ANTIOXIDANT CAPACITY IN THE PEEL OF ELEVEN CHINA-GROWN POMEGRANATE CULTIVARS

In this research, the contents of total polyphenols and flavonoids in the peel of 11 China-grown pomegranate cultivars were investigated with the methods of Folin-Ciocalteu and NaNO₂-Al(NO₃)₃-NaOH, respectively.
Total antioxidant capacity was determined using ferric reducing antioxidant capacity (FRAP) assay.
The results showed that ‘Fentian’ had the highest polyphenols content followed by ‘Danhong’, ‘Chuanhui’, ‘Xingzi’, ‘DRF-1’, ‘D3’, ‘Chonghuang’, ‘Chongfen’, ‘Baiyue’, ‘Dasuan’, and ‘Damo’. By comparing the flavonoids content in the peel of different cultivars, the following trend was observed: ‘DRF-1’ > ‘D3’ > ‘Chuanhui’ > ‘Fentian’ > ‘Chonghuang’ > ‘Xingzi’ > ‘Danhong’ > ‘Dasuan’ > ‘Chongfen’ > ‘Baiyue’ > ‘Damo.
This evidence indicates that the two antioxidants contents in pomegranate peel may be cultivar-specific.
Among the eleven cultivars, the trend in total peel antioxidant capacity was ‘Fentian’ > ‘Danhong’ > ‘Xingzi’ > ‘D3’ > ‘Chuanghui’ > ‘DRF-1’ > ‘Chonghuang’ > ‘Dasuan’ > ‘Baiyue’ > ‘Damo’ > ‘Chongfen’. Correlation analysis showed that the total antioxidant capacity in the peel had a strong linear relationship with the polyphenols content (r=0.90), indicating the total antioxidant capacity of pomegranate peel may be attributed to the content of total polyphenols.
Together, this study may be beneficial in the cultivar selection and application of pomegranate peel.

XXVIII International Horticultural Congress on Science and Horticulture for People (IHC2010): International Symposium on Emerging Health Topics in Fruits and Vegetables

C.C. Hu, J.Z. Xu, J.Z. Shao, X.Y. Yang

antioxidant capacity, flavanoids, polyphenols, pomegranate, procyanidins

https://doi.org/10.17660/ActaHortic.2012.939.22