Diversity of content and composition of cell wall-derived dietary fibre in polished rice

A - Papers appearing in refereed journals

Kosik, O., Romero, M. V., Bandonill, E. H., Abilgos-Ramos, R. G., Sreenivasulu, N., Shewry, P. R. and Lovegrove, A. 2020. Diversity of content and composition of cell wall-derived dietary fibre in polished rice . Journal of Cereal Science. 96, p. 103122. https://doi.org/10.1016/j.jcs.2020.103122

AuthorsKosik, O., Romero, M. V., Bandonill, E. H., Abilgos-Ramos, R. G., Sreenivasulu, N., Shewry, P. R. and Lovegrove, A.
Abstract

Rice, the staple food of more than half the world’s population, is consumed mainly after polishing which removes beneficial components, particularly vitamins, minerals and dietary fibre (DF). Furthermore, the consumption of polished rice and other highly refined foods has been related to high incidences of chronic non- communicable diseases, including type 2 diabetes and cardiovascular disease. We have therefore used monosaccharide analysis to compare cell wall polysaccharides in polished grain of a diversity panel of 370 rice lines, showing that DF varies in amount (by over three-fold) and in composition. The water unextractable (WU) non- starch polysaccharides (NSP) comprise up to 99.6% of total NSP with galacturonic acid and galactose being the most abundant monosaccharides. Correlation analysis of individual monosaccharides predicted pectin, arabinogalactan and glucurono(arabino)xylan as the dominant polysaccharides. Hierarchical clustering analysis (HCA) and principal component analysis (PCA) were used to classify the lines into 10 groups which differed in both total amount and composition of NSP. This identified a small group of lines with high contents of WU NSP which may be exploited to develop new rice cultivars with high contents of DF in polished grain, reducing the risk of chronic diet-related diseases.

Year of Publication2020
JournalJournal of Cereal Science
Journal citation96, p. 103122
Digital Object Identifier (DOI)https://doi.org/10.1016/j.jcs.2020.103122
Open accessPublished as non-open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeNewton Fellowship
Output statusPublished
Publication dates
Online21 Oct 2020
Publication process dates
Accepted20 Oct 2020
PublisherAcademic Press Ltd- Elsevier Science Ltd
ISSN0733-5210

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