藜麦（Chenopodium quinoa W.）和苋属植物（Amaranthus caudatus L.）能提供富含果胶物质和木葡聚糖的膳食纤维。
Quinoa (Chenopodium quinoa W.) and amaranth (Amaranthus caudatus L.) provide dietary fibres high in pectic substances and xyloglucans.
作者信息
Lamothe Lisa M, Srichuwong Sathaporn, Reuhs Bradley L, Hamaker Bruce R
机构信息
Whistler Center for Carbohydrate Research and Department of Food Science, Purdue University, 745 Agriculture Mall Dr. West Lafayette, IN 47907, United States.
Nestlé Research Center, Department of Food Science and Technology, PO Box 44, Vers-chez-les-Blanc, CH-1026 Lausanne, Switzerland.
出版信息
Food Chem. 2015 Jan 15;167:490-6. doi: 10.1016/j.foodchem.2014.07.022. Epub 2014 Jul 11.
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%.
对藜麦和苋菜籽的膳食纤维进行了分析，测定其不溶性和可溶性纤维的含量、组成及结构。藜麦的总膳食纤维含量为10%，苋菜籽为11%。对于这两种假谷物而言，其膳食纤维的78%为不溶性。藜麦和苋菜籽的不溶性纤维（IDF）主要由半乳糖醛酸、阿拉伯糖、半乳糖、木糖和葡萄糖组成。连接分析表明，IDF由同型半乳糖醛酸聚糖和带有阿拉伯聚糖侧链（约55 - 60%）的鼠李糖半乳糖醛酸聚糖-I，以及高度分支的木葡聚糖（约30%）和纤维素组成。对于这两种假谷物来说，总膳食纤维的22%为可溶性；这一比例高于小麦和玉米中的比例（约15%）。可溶性纤维（SDF）由葡萄糖、半乳糖醛酸和阿拉伯糖组成；对于苋菜籽，木糖也是主要成分。木葡聚糖占SDF的约40 - 60%，富含阿拉伯糖的果胶多糖占约34 - 55%。
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