Journal
CARBOHYDRATE POLYMERS
Volume 273, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2021.118583
Keywords
Agriophyllum squarrosum starch; High-performance anion exchange; chromatography; Amylopectin unit chain profiles; Gel permeation chromatography; In vitro digestibility
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Funding
- Key Project of Natural Science Foundation of Ningxia Hui Autonomous Region [2021AAC02020]
- National Natural Science Foundation of China [31460406]
- School-Enterprise Joint Funded Projects of North Minzu University [2020-131]
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The study compared the novel starch resources isolated from Agriophyllum squarrosum with quinoa starch, revealing that AS has lower viscosity and swelling degree, higher molecular weight, slower digestion rate than QS, which is suitable for application and domestication of A. squarrosum crops.
Novel starch resources isolated from accessible botanical origins are of special interest to food scientists in the context of food security. In this study, Agriophyllum squarrosum starches (AS-1, AS-2, and AS-3) were isolated from three ecotypes of A. squarrosum seeds and compared with quinoa starch (QS). The mean particle diameter of AS granules ranged from 1.12 to 1.15 mu m, and AS amylopectin had a significantly higher Mw than QS (p < 0.05). Compared with QS, AS samples had more branching and substitution of amylopectin structures. The peak viscosity, breakdown viscosity, and swelling degree of the AS samples were significantly lower than those of QS (p < 0.05). AS showed a lower crystalline degree and higher gelatinization temperatures, and the freshly cooked AS showed a slower digestibility rate than QS. The physicochemical properties and chain profiles of AS facilitate the application of AS and the domestication of A. squarrosum crops.
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