Unraveling cereal physical barriers composed of cell walls and protein matrix: Insights from structural changes and starch digestion
文献类型： 外文期刊
作者： Chen, Xiaoyu 1 ; Zhu, Ling 1 ; Zhang, Hui 1 ; Wu, Gangcheng 1 ; Cheng, Lilin 2 ; Zhang, Yayuan 3 ;
作者机构： 1.Jiangnan Univ, Natl Engn Res Ctr Funct Food, Collaborat Innovat Ctr Food Safety & Qual Control, Sch Food Sci & Technol, Wuxi 214122, Peoples R China
2.Henan Agr Univ, Coll Food Sci & Technol, Zhengzhou 450002, Henan, Peoples R China
3.Guangxi Acad Agr Sci, Agrofood Sci & Technol Res Inst, Nanning, Peoples R China
关键词： Cereals; Cell wall; Protein matrix; Cooking transformation; Starch digestion
期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.5； 五年影响因子：8.7 ）
ISSN： 0141-8130
年卷期： 2024 年 279 卷
页码：
收录情况： SCI
摘要： Physical barriers composed of cell walls and protein matrix in cereals, as well as their cooking changes, play important roles in starch digestion. In this study, the physical barriers of native and cooked highland barley (HB), brown rice (BR), and oats (OA) kernels and their contribution to starch digestion were investigated. The resistant starch content was similar in cereal flours, but varied among cooked kernels (HB > BR > OA: 45.05 %, 10.30 %, and 24.71 %). The water adsorption, gelatinization enthalpy, and decrease in hardness of HB kernels were lower than those of OA and BR kernels. Microstructural observations of native kernels showed that HB had the thickest cell walls. After cooking, the lowest cell wall deformation and a dense continuous network developed from the protein matrix were observed in HB kernels. During digestion, undigested starch granules encapsulated by the stable cell walls and strong protein network were observed in HB kernels, but not in BR or OA kernels. Furthermore, the heavily milled HB kernels still had more resistant starch than the intact OA and BR kernels. Therefore, the physical barriers of HB kernels exhibited stronger inhibition of starch gelatinization and digestion. Differences in cereal physical barriers led to various inhibitory effects.
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