Abstract
The aim of this study was to compare the physicochemical properties and antioxidant activity of five different pomegranate cultivars. Fruit mass ranged from 109.27 to 78.07 g. Peel thickness of the fruit was recorded from 5.05 to 2.70 mm. The pH, total soluble solids content, the titratable acidity content were within the range of 4.23 to 4.36, 20.00 (◦Brix) to 14.05 (◦Brix), 0.04 to 0.007 mg per 100 g of juice, respectively. Ascorbic acid content was from 4.73 to 1.98 mg per 100 g of juice. The amount of total phenolics in pomegranate cultivars was between 6.36 and 1.78 mg GAE/100 ml. The total flavonoids content also ranged between 4.93 to 2.24 mg GAE/100 ml. The level of antioxidant activity was varied from 86.77 % to 79.54 %. Reducing sugar content ranged between 5.81 to 1.72 mg/100g. Glucose content was found from 3.48 to 1.14 mg/100g. In total based on these results, the cultivar is the main parameter which influences the physic-chemical properties and antioxidant activity in pomegranates.
Highlights
Pomegranate (Punica granatum L.) is an important commercial fruit that is cultivated in many tropical and subtropical climates including Asia, North Africa, the Mediterranean and the Middle East (Khoshnam et al, 2007; Sarkhosh et al, 2006)
Significant difference were detected in length, length/diameter, juice volume, calyx length, peel thickness, length of aril, seed diameter and moisture (P < 0.01), mass and peel moisture (P < 0.05), while there were not showed significant differences in traits of diameter, width, volume, density and calyx diameter of fruits
The results of our research were lower than value (5.7 - 7.6 %) reported by Gadze et al (2012). These results showed that the levels of reducing sugar, glucose and other physicochemical properties were different among various cultivars of pomegranate that could be due to existence of high genetic heterogeneity within the cultivars (Tehranifar et al, 2010)
Summary
Pomegranate (Punica granatum L.) is an important commercial fruit that is cultivated in many tropical and subtropical climates including Asia, North Africa, the Mediterranean and the Middle East (Khoshnam et al, 2007; Sarkhosh et al, 2006). Iran is one of the most important pomegranate producer and exporter in the world (Anonymous, 2005; Tehranifar & Mahmoodi-Tabar, 2009). Pomegranate cultivation has a long tradition in Iran. It is considered one of the most important fresh fruits in this country (Barone et al, 2001). It is widely grown in many tropical and. The total production of pomegranate in Iran was 670,000 tons in 2005 (Anonymous, 2005)
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