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Journal article
The Impact of Rice Lipid on In Vitro Rice Starch Digestibility
Foods, Vol.11(10), 1528
23/05/2022
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Abstract
The negative role of lipids in rice starch digestion is well-known; however, the effect of individual native lipids on starch digestibility has not been studied. In this study, native rice lipids, such as triacylglycerols (TAGs), diacylglycerols (DAGs), phosphatidylcholines (PCs) and lysophospholipids (LPLs), were analyzed using liquid chromatography–mass spectrometry (LC-MS) and correlated with in vitro rice starch digestibility. Most of the tested lipids exhibited a negative correlation with the in vitro starch digestibility with the correlations being more pronounced for LPLs. Removal of lipids from rice flour increased the in vitro starch digestibility. Conversely, a lipid extract addition to rice flour reduced the starch digestibility. Addition of 1% pure lysophosphatidylcholine (LPC)16:0, TAG54:6, DAG36:4 or PC36:2 individually to rice flour reduced starch digestibility by different extents in the order of LPC16:0 > TAG54:6 > PC36:2 > DAG36:4. LPC16:0 was the most abundant lipid among all the assessed lipids in the white rice (milled rice), and addition of 1% LPC 16:0 to rice flour reduced glucose release following three hours of in vitro starch digestion by 7.4%. There may be a scope to breed rice with a lipid composition to reach a desired starch digestibility or simply through addition of certain lipids before cooking the rice.
Details
- Title
- The Impact of Rice Lipid on In Vitro Rice Starch Digestibility
- Creators
- Amina Khatun - Southern Cross UniversityDaniel L E Waters - Southern Cross UniversityLei Liu - Southern Cross University
- Publication Details
- Foods, Vol.11(10), 1528
- Comment
- Acknowledgments: Authors thank the Bangladesh Rice Research Institute (BRRI) and Purnava Limited, Bangladesh, for their rice samples. The first author thanks the Australian Government, Department of Education, for the scholarship.
- Publisher
- MDPI AG
- Identifiers
- 991013023921102368
- Copyright
- © 2022 by the authors
- Academic Unit
- Environmental Analysis Laboratory; Faculty of Science and Engineering; Science
- Language
- English
- Resource Type
- Journal article