Chemical and phytochemical properties and antioxidant activities of three pomegranate cultivars grown in South Africa
Date
2011-02
Journal Title
Journal ISSN
Volume Title
Publisher
Springer Verlag
Abstract
A comparative study of chemical contents and
antioxidant activities of three pomegranate cultivars
(‘Arakta’, ‘Bhagwa’ and ‘Ruby’) grown in South Africa
was conducted. Fresh pomegranate juice (PJ) of each
cultivar were assessed for soluble solid contents (SSCs),
pH and titratable acidity (TA), while extracted juice
samples were evaluated for total phenolic (TP), including
total tannins (TT), proanthocyanidins (Pcy), total flavonoids,
anthocyanins and gallic acids (GA) using spectrophotometric
methods. The antioxidant properties of the
juice samples were evaluated against stable 2, 2–
diphenyl–1–picryl hydrazyl, as well as in ferric reducing
ability of plasma (FRAP) and QuantiChrom™ (TAC)
antioxidant assays. There were significant differences in
the chemical properties of the cultivars. SSC, TA and pH
varied between the range of 14.07–15.10 °Brix, 0.22–
0.28 g/100 ml and 3.32–3.64, respectively. ‘Bhagwa’ had
the highest TP (449.9 mg/100 ml), 1.3-fold and 1.6-fold
higher than ‘Arakta’ and ‘Ruby’, respectively. The
strongest total antioxidant activity was exhibited by
‘Bhagwa’ with an antioxidant index of 95.7%, followed
by ‘Arakta’ (93.2%) and ‘Ruby’ (79.9%). PJ phytochemical
properties (TP, TT, Pcy, GA) and antioxidant activity
(FRAP and TAC) were significantly correlated (r2=
0.509–0.885) with each other.
Description
The original publication is available at http://www.springerlink.com
Keywords
Pomegranate cultivars, Pomegranate -- Antioxidant activities, Ferric reducing ability of plasma, Phytochemical analysis
Citation
Fawole, O. A, Opara, U. L. & Theron, K. I. 2012. Chemical and Phytochemical Properties and Antioxidant Activities of Three Pomegranate Cultivars Grown in South Africa. Food Bioprocess Technol, 5(2), doi:10.1007/s11947-011-0533-7.