期刊
CARBOHYDRATE POLYMERS
卷 172, 期 -, 页码 213-222出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.05.046
关键词
Rice; Starch; Fine structure; Gelatinization; Pasting properties
资金
- Rural Industries Research and Development Corporation (RIRDC)
- Australian Research Council (ARC)
- Lampang Rajabhat University, Thailand
- National Science Foundation of China [C1304013151101138]
Australian wild rices have significant genetic differences from domesticated rices, which might provide rices with different starch molecular structure and thus different functional properties. Molecular structure, gelatinization properties, and pasting behaviours of starch of three Australian wild rices (Oryza australiensis, taxa A (O. rufipogon like) and taxa B (O. meridionalis like)) were determined and compared to domesticated indica and japonica rice. These had higher amylose content, more shorter amylose chains and fewer short amylopectin chains, resulted in a high gelatinization temperature in these wild rices. Compared to domesticated japonica rice, taxa A had a lower pasting viscosity; taxa B had a similar pasting viscosity but lower final viscosity. The significantly different starch molecular structure from that of normal domesticated rices, and concomitantly different properties, suggest advantageous uses in products such as rice crackers or rice pudding, and a source of nutritionally-desirable slowly digestible starch. (C) 2017 Elsevier Ltd. All rights reserved.
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