期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 62, 期 46, 页码 11254-11263出版社
AMER CHEMICAL SOC
DOI: 10.1021/jf503999r
关键词
high-amylose rice; heterogeneous starch granule; molecular weight distribution; crystalline structure; lamellar structure; thermal property
资金
- National Natural Science Foundation of China [31270221]
- Qing Lan Project of Jiangsu Province
- Talent Project of Yangzhou University
- Yangzhou University
- Priority Academic Program Development of Jiangsu Higher Education Institutions
High-amylose cereal starches usually have heterogeneous starch granules in morphological structure. In the present study, the polygonal, aggregate, elongated, and hollow starch granules were separated from different regions of the kernels of high-amylose rice, and their structures were investigated. The results showed that the polygonal starch granules had low amylose content and high short branch-chain and branching degree of amylopectin, and exhibited A-type crystallinity. The aggregate starch granules had high long branch-chain of amylopectin, relative crystallinity, and double helix content, and exhibited C-type crystallinity. The elongated starch granules had high amylose content and low branching degree of amylopectin and relative crystallinity, and exhibited C-type crystallinity. The hollow starch granules had very high amylose content, proportion of amorphous conformation, and amylose lipid complex, and very low branch-chain of amylopectin, branching degree of amylopectin, and double helix content, and exhibited no crystallinity. The different structures of heterogeneous starch granules from high-amylose rice resulted in significantly different thermal properties.
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