Structure and digestibility of endosperm water-soluble ¦Á-glucans from different sugary maize mutants

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• 作者：Ming Miao ; Rong Li ; Bo Jiang ; Steve W. Cui ; Keyu Lu ; Tao Zhang
• 关键词：Water-soluble polysaccharide ; Sugary maize ; Nanoparticle ; Fine structure ; Digestibility
• 刊名：Food Chemistry
• 出版年：2014
• 出版时间：15 January, 2014
• 年：2014
• 卷：143
• 期：Complete
• 页码：156-162
• 全文大小：835 K

文摘

The structure and digestibility of endosperm water-soluble ¦Á-glucans from different sugary-1 maize mutants (Zhongtian 8#, Zhongtian 2# and Pintian 8#) were investigated. The yield of pure glucan was in the range of 25.91-34.38 % . The ¦Á-glucan belonged to a typical native nano-scale particle and the average particle size was in the following order: Zhongtian 8# >Pintian 8# >Zhongtian 2#. The weight-average molar mass of glucans ranged from 1.69 to 2.08 ¡Á 10⁷ g/mol. The branch densities and ¦Á-1,6 linkages of Zhongtian 8#, Zhongtian 2# and Pintian 8#, were 8.60 % , 8.77 % and 9.51 % , 7.71 % , 6.58 % and 6.81 % , respectively. The resistant starch (10.06 % ) of Pintian 8# was lower than other two cultivars. The study showed that water-soluble glucan exhibited ¦Á-1,4-linked backbone with ¦Á-1,6 branch sites and digestibility was influenced by granule size, ratio of ¦Á-1,4 to ¦Á-1,6 linkages, molecular fine structure in this set of sugary maize mutants.