Total Polyphenol, Polyphenol Oxidase, Antioxidant Activity and Color Profiles of Some Wheat Varieties from Bangladesh

Nine wheat varieties (Shatabdi, Showrav, Protiva, Ahgrani, Kanchan, Akbar, Barkat, Sonalika, Kheri) from Bangladesh were analyzed for determination of total polyphenol (TP), polyphenoloxidase (PPO), antioxidant activities (AA) and color index (CI). The highest TP (1.316 mg /gm GAE) and AA (14.58%) determined in Shatabdi and PPO (0.295 U x ml-1 x min) in Barkat. The lowest TP (1.280 mg /gm GAE), PPO (0.145 U x ml-1 x min) was determined in Akbar and the lowest AA (7.64%) was in Sonalika . Least color index was obtained in Akbar but good color parameters for wheat like brightness and yellowness values were found higher in Shatabdi. There was stronger correlation found between AA and TP than among TP, AA, PPO and CI. Comperatively new released varieties, Protiva, Shourav (BARI Gom-19) and Shatabdi (BARI Gom- 21) have higher level of TP, AA with brighter color profile.