1. Saturated, monounsaturated and polyunsaturated fatty acid profiles of commercially important traditional and new improved red and white rice varieties of Sri Lanka.
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Samaranayake, Madara Dilrukshi Wijesekara, Abeysekera, Walimuni Kanchana Subhashini Mendis, Hewajulige, Ilmi Ganga Namali, Somasiri, Hewa Pathiranage Preethi Sudarshana, Mahanama, Kariyawasam Ranaweerage Ranjith, Senanayake, Dassanayake Mudiyanselage Jayantha Bandara, and Premakumara, Galbada Arachchige Sirimal
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MONOUNSATURATED fatty acids , *UNSATURATED fatty acids , *RICE , *RED rice , *OMEGA-6 fatty acids , *PALMITIC acid , *OLEIC acid - Abstract
The present study evaluated saturated, monounsaturated, and polyunsaturated fatty acid (FA) profiles of seven new improved and three traditional red and white rice varieties (RV) of Sri Lanka. Oil was extracted from whole grain rice flour, derivatized to methyl esters, and analyzed by gas chromatography (n = 3 each). Results showed significant differences (p < 0.05) in FA profiles among the RV, red vs white RV, and traditional vs new improved RV. The oil % of RV varied from 1.94–3.19%. Total FAs, saturated fatty acids (SFAs), monounsaturated fatty acids (MUFAs), polyunsaturated fatty acids (PUFAs), total unsaturated FAs, and PUFAs to SFAs ratios of studied RV varied from 19.40–31.90, 4.40–7.04, 8.35–13.60, 6.65–11.26 and 15.00–24.86 mg/g of rice and 1.44–1.83 respectively. The tested RV had four omega-6 FAs while omega-3 FAs were absent. The major FAs found in all RV were palmitic, oleic, and linoleic acids and these three FAs together contributed to 88–95% of the total FAs present in rice. Among these FAs, 70–76% were unsaturated FAs. Considering all, RV consisting of healthy fatty acid profiles could be identified by studying their total fatty acid profile rather than studying their oil % and the total fatty acid contents. • Fatty acid (FA) profiles varied significantly among the studied rice varieties. • All varieties had more unsaturated FAs compared to saturated FAs. • Polyunsaturated FAs/saturated FAs ratio was high in white rice varieties. • Differences among rice varieties were due to individual FAs rather than total FAs. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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