Structure and digestion of hybrid Indica rice starch and its biosynthesis

被引:26
|
作者
Kuang, Qirong [1 ]
Xu, Jinchuan [1 ]
Wang, Kai [2 ]
Zhou, Sumei [1 ]
Liu, Xingxun [1 ]
机构
[1] Chinese Acad Agr Sci, Inst Food Sci & Technol, Beijing, Peoples R China
[2] South China Agr Univ, Coll Food Sci, Guangzhou, Guangdong, Peoples R China
关键词
Structure; Digestion; Indica rice starch; Biosynthesis; IN-VITRO DIGESTIBILITY; PHYSICOCHEMICAL PROPERTIES; RESISTANT STARCH; AMYLOSE CONTENT; ALPHA-AMYLASE; MAIZE; RETROGRADATION; HYDROLYSIS; AMYLOLYSIS; COOKING;
D O I
10.1016/j.ijbiomac.2016.08.023
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The fine structure (including contents, size and chains length distribution) of amylose and amylopectin of Hybrid Indica Rice starch have an impact on digestion properties of Indica Rice. Indica Rice starches with different amylose contents were chosen as model materials in this study. The amylose and amylopectin size were characterized using size-exclusion chromatography (SEC), the fine structure of amylopectin were studied by flurophore-assisted carbohydrate electrophoresis (FACE) and parameterized by amylopectin biosynthesis model to identify associations with starch digestibility. The digestograms of all starches fit first-order kinetics. All results show that the hybrid Indica rice starch with higher amylose content has a slower digestion rate. SEC results show that there is no obviously in chains length distribution (CLD) for amylopectin, but a significantly sharp difference in amylose. No difference in amylopectin was also observed from FACE result. The amylose starch controlled by GBSSI enzyme may be the key parameter to influence starch digestion. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:402 / 407
页数:6
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