A Study on Phytochemicals and Mineral Content of Indigenous Red Rice of Assam, India

Abstract

Considering nutraceutical potentiality of phytochemicals, a few indigenous red rice germplsams of Assam, India were analysed for various phytochemicals, antioxidant activities and a few mineral contents. Among the sixteen germplasm analysed in their brown form, the total phenol content, total flavonoid content, and the anthocyanin content per100 gm dry matter ranged from752.89 mg±18.12 ('Ranga Dariya') to 2223 mg±33.48 ('Amana Bao'), 252.12±15.40mg ('Ixojoy') to 1000.75±86.93mg ('Dal Bao') and 76.05± 0.32 µg ('Kolaguni') to159.42±15.97 µg ('Betu'), respectively. For the polished form of rice, the same in 100 gm dry matter ranged from76.51 mg±1.46 in 'Ranga Dariya' to 1409 mg±100.88 in 'Kolaguni', from 32.09± 7.17 mg in 'Ranga Dariya' to 374.46± 2.05mg in 'Negheribao' and from 17.91±5.08µg ('Biroi') to 115.42±11.72µg ('Hurupibao'), respectively. The antioxidant activities were observed to be the highest 96.00±0.26% in 'Negheribao' (for brown form of rice) and 86.35± 3.88% in 'Kenekuabao' (for polished form of rice) and the lowest 81.54±0.23% in 'Betu'(for brown form of rice) and 59.65±4.64 % in 'Ranga Dariya' (polished rice), respectively. In brown rice, on dry weight basis, the iron, zinc and manganese content ranged from 2.12-54.40 mg per 100 gm, 2.42 mg to 26.57mg per 100 gm and 0.04 mg per 100 gm to 25.13 mg per 100 gm, respectively. The study revealed some indigenous rice germplasm of Assam, India which are significant considering phenolic compounds and mineral content.

Nutritional Composition, Mineral Content and Antioxidant Properties of Unpolished Red Rice Cultivars of Assam, India

“…Mineral content of red rice cultivars.Nutritional Composition, Mineral Content and Antioxidant Properties of Unpolished Red Rice Cultivars of Assam, India study was comparable to the reported values ofReddy et al 2017, Mudoi andDas, 2019. …”

“…Very few studies were reported on the colored rice cultivars of Assam, India (Saikia et al 2012, Mudoi and Das, 2018, 2019. In this regard, different cultivars of red rice of Assam were investigated to determine the nutritional and antioxidant properties.…”

Phytic Acid and Micronutrient Profiling of a Few Ethnic Rice Products of Assam, India

“…The iron content of brown form was found to be 2.13 to 3.39 mg/100 g, which was found to be lower than the values (2.12-54.40 mg/100 gm) reported for pigmented rice varieties of Assam (Mudoi and Das, 2019).…”

“…The total phenol content of brown form of specialty rice was found to be lower than the value (232.94±11.45 to 2223.68±33.48 mg catechol/100 g) reported for few indigenous rice including pigmented rice germplasms of Assam (Mudoi and Das, 2019).…”

Screening of Red-kernelled Deep Water Rice Germplasm of Assam, India for Disease and Pest Resistance

“…As a conservative estimation, Assam has approximately 100,000 ha area under DWR cultivation (Rohilla et al, 2019). Most of the DWR varieties have red kernels, which is due to the accumulation of polyphenols and anthocyanins in the aleurone layer and it possesses antioxidant properties (Mudoi and Das, 2019). Red kernelled rice varieties…”