S. Sanguansil, U. Boonprakob , K. Thaipong
Phytochemicals, especially antioxidants, have been of interest to the public due to their health-promoting potential. The objective of this study was to determine antioxidant content in guava fruits of diversed germplasm. Fruits of 24 guava cultivars consisting of 9 white, 2 maroon, 9 pink and 4 creamy flesh. Fruits collected during December 2010-February 2011 were analyzed for antioxidant activity, total phenolic content, total flavonoid content and ascorbic acid content. Guava germplasm showed large variation in antioxidant content and activity. Averaged antioxidant activity (AOA), total phenolics (TPH), total flavonoids (TFL) and ascorbic acid (AA) contents were 11.33±3.46 µmol AAE/g FW, 168.21±49.47 mg GAE/100 g FW, 41.51±14.98 mg catechin/100 g FW and 82.69±44.44 mg/100 g; respectively. High amount of antioxidant content and activity were found in maroon flesh cultivars. ‘Daeng Siam’ cultivar had the highest of AOA (19.03±4.65 µmol AAE/g FW), TPH (276.54±51.78 mg GAE/100 g FW) and AA (151.85±81.07 mg/ 100 g FW). It is proposed that developing new guava cultivars with higher level of natural antioxidant compounds in which maroon-flesh cultivars have potential to be used as parents for creating hybrids with high antioxidants is feasible.
Sanguansil, S., Boonprakob , U. and Thaipong, K. (2014). QUANTIFICATION OF ANTIOXIDANT CONTENT IN FRUIT OF GUAVA GERMPLASM. Acta Hortic. 1024, 385-390
DOI: 10.17660/ActaHortic.2014.1024.53
ascorbic acid, phenolics, flavonoids, germplasm evaluation, guava breeding

Acta Horticulturae