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Antioxidant Properties of Traditional and High Yielding Varieties of Rice Grown in Bangladesh- 2011

Muhammad Ali Siddiquee, PhD
Principal Scientific Officer
Grain Quality and Nutrition Division, BRRI

Abstract/ Executive Summary:

Overall our findings in this study proved that the HYV and aromatic rice varieties of our country have high level of antioxidant which can be effectively utilized to meet our daily requirements. If the growing condition like the use of fertilizer, irrigation system, harvesting time etc, solar radiation and other facilities can be improved. Rice can be a rich source of antioxidant like other plant species.

Keywords: Antioxidant properties, Traditional varieties, High yielding varieties, Rice

Location: Grain Quality and Nutrition Division Laboratory, BRRI HQ

Start Date: 01-07-2010

End Date: 30-06-2011

Program Area: Quality and Nutrition

Commodity: Rice

Objectives:

To evaluate the antioxidant properties of some traditional and high yielding varieties of rice.

Methodology:

For this study, a total 20 rice varieties were taken. Total phenolic content (TPC), ferric reducing antioxidant power (FRAP), 1,1 diphenyl picrylhydrazyl (DPPH) radical scavenging activity, and total antioxidant capacity (TAC) were determined by the standard procedure for the twenty rice verities namely BR5, BR7, BR16, BR22, BRRI dhan28, BRRI dhan29, BRRI dhan34, BRRI dhan37, BRRI dhan38, BRRI dhan50, Tulsi mala, Basmoti 370, Philipine Kataribhog, Chinigura, Radhunipagol, Tulsimalati, Thakurbhog, Khirshaboti, Gopalbhog and Binapul.

Source of Information: BRRI Annual Research Report 2010-2011

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Total phenolic content (TPC)- For HYV rice, BR5 showed the highest TPC (25.35 ± 0.52 mg 100-1g) and BR22 (13.61 ± 0.43 mg 100-1g) displayed the lowest TPC which is slightly lower than the BRRI dhan28 (13.94 ± 0.58 mg 100-1g). For traditional rice, Chinigura displayed the highest amount of TPC (20.56 ± 2.01 mg 100-1g). Radhunipagol and Tulsimalati exhibited the lowest amount of TPC (11.79 ± 0.08 mg 100-1g and 11.74 ± 0.08 mg 100-1g) respectively. Ferric reducing antioxidant power (FRAP)- BR5 of HYV rice showed the highest amount of FRAP (34.56 ± 0.34 mg 100-1g) while BR16 displayed the lowest (15.93 ± 0.08 mg 100-1g). For traditional rice, Tulsi mala, unlike TPC, had the highest amount of FRAP (32.16 ± 0.60 mg 100-1g). Moderately higher amount of FRAP was observed in Khirshaboti, Binapul, Gopalbhog, Chinigura, and comparatively lower amount was found in Basmoti 370, Philipine Kataribhog, Radhunipagol. Total antioxidant capacity (TAC)- For HYV rice, BR5 had the highest TAC (124.15 ± 2.59 mg 100-1g) while BR16 displayed the lowest (52.55 ± 3.45 mg 100-1g). On the other hand, for traditional rice, Chinigura showed the highest amount of TAC (100.06 ± 9.94 mg 100-1g). Tulsimalati had the lowest amount of TAC (56.88 ± 0.00 mg 100-1g) which is slightly lower than the Radhunipagol (57.18 ± 0.03 mg 100-1g). DPPH radical scavenging activity- The scavenging effect of HYV rice extracts on DPPH radical increased from 1 to 12 mg/mL and was 3.73 ± 0.26 g 100-1g for BR16 to 66.65 ± 0.73 g 100-1g BRRI dhan34. On the other hand, the scavenging effect of aromatic rice extracts on DPPH radical increased from 3.41 ± 0.23 g 100-1g for Philipine Kataribhog to 70.56 ± 2.36g 100-1g for Tulsimala.

Knowledge Management: Report/Proceedings