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Effect of grain development on antioxidant activity of Thai landrace rice |
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| รหัสดีโอไอ | |
| Title | Effect of grain development on antioxidant activity of Thai landrace rice |
| Creator | Maythaporn Pholva Angkana Chantaraponpan and Tatdao Paseephol |
| Contributor | Department of Food Technology and Nutrition, Faculty of Technology Mahasarakham University Khamriang Kantarawichai Mahasarakham 44150 Thailand |
| Publisher | Mahasarakham University |
| Publication Year | 2560 |
| Keyword | Thai landrace rice TPC anthocyanin antioxidant activity |
| Abstract | This research was conducted to investigate the total phenolic content (TPC), anthocyanin content (AC) and antioxidant capacity of two varieties of Thai landrace rice i.e. Kumbikiew (black glutinous rice) and Niaow Dang (red glutinous rice) at 30, 37 and 51 days of grain development. The results showed that the TPC of Kumbikiew rice was highest at 51 days (319.72 mg GAE/100 g db); however the TPC of Niaow Dang rice (424.50 mg GAE/100 g db) was highest at 30 days and significantly higher than those at later stages (pฃ0.05). Overall, Kumbikiew rice had higher AC than Niaow Dang rice at all stages of development after flowering. Both cultivars showed the highest AC at 30 days (178.67 and 1.11 mg Cyanidin-3-glucoside/100 g db, respectively). The antioxidant capacity determined using DPPH, ABTS radical scavenging and FRAP assays demonstrated as trend similar to that of TPC. The FRAP values, DPPH and ABTS scavenging activities of Kumbikiew rice at 51 days (6.38 mmol FeSO4/100 g db, IC50DPPH 2.05 mg/ml and IC50ABTS 1.49 mg/ml, respectively) were significantly higher than those at 30 and 37 days. The highest antioxidant activities of Niaow Dang rice were detected at 30 days, showing reducing power (FRAP) at 5.75 mmol FeSO4/100 g, IC50DPPH at 2.17 mg/ml and IC50ABTS at 1.31 mg/ml. |
