alexa Quinoa (Chenopodium quinoa W.) and amaranth (Amaranthus caudatus L.) provide dietary fibres high in pectic substances and xyloglucans.
Nutrition

Nutrition

Journal of Nutrition & Food Sciences

Author(s): Lamothe LM, Srichuwong S, Reuhs BL, Hamaker BR

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Abstract Dietary fibre of quinoa and amaranth was analysed for its insoluble and soluble fibre content, composition, and structure. Total dietary fibre content was 10\% for quinoa and 11\% for amaranth. For both pseudocereals, 78\% of its dietary fibre was insoluble. Insoluble fibre (IDF) from quinoa and amaranth was mainly composed of galacturonic acid, arabinose, galactose, xylose and glucose. Linkage analysis indicated that IDF was composed of homogalacturonans and rhamnogalacturonan-I with arabinan side-chains (∼55-60\%), as well as highly branched xyloglucans (∼30\%) and cellulose. For both pseudocereals, 22\% of total dietary fibre was soluble; a higher proportion than that found in wheat and maize (∼15\%). The soluble fibre (SDF) was composed of glucose, galacturonic acid and arabinose; for amaranth, xylose was also a major constituent. Xyloglucans made up ∼40-60\% of the SDF and arabinose-rich pectic polysaccharides represented ∼34-55\%. Copyright © 2014. Published by Elsevier Ltd. This article was published in Food Chem and referenced in Journal of Nutrition & Food Sciences

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