Journal
FOOD & FUNCTION
Volume 10, Issue 9, Pages 5312-5322Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9fo00928k
Keywords
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Funding
- National Natural Science Foundation of China [31701546]
- National Key Research and Development Program of China [2017YFD0400502]
- Natural Science Foundation of Guangdong Province [2017A030313207]
- Fundamental Research Funds for the Central Universities of China [x2skD2191320, 2018KZ13]
- 111 Project [B17018]
- Hong Kong Scholar Program [XJ2019049]
- Pearl River Talent Recruitment Program of Guangdong Province [2017GC010229]
- Pearl River Nova Program of Guangzhou [201906010079]
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Modulation of the starch digestion rate and extent is a major target for increasing nutritional value of potato-based food. In order to understand the effect of controlled gelatinization on the structure and in vitro digestion properties of whole potato food, intact parenchyma cells were isolated as a model through soaking in mild acid and alkali solutions, and then hydrothermally treated at different incubation temperatures in excess water. The morphological and structural changes of entrapped starch granules as well as in vitro starch digestion properties were investigated. Three classes of starch digestion of potato cells are identified: (1) when the temperature of hydrothermal treatment was set at 55 degrees C or 60 degrees C, the efficient physical barrier of intact cell walls resulted in a limited starch digestion extent; (2) when the temperature is set at 65 degrees C, the cell wall structures apparently reduced the digestion rate but only slightly reduced the final extent compared to the starch counterpart, probably because starch swelling weakens the physical barrier; (3) at 70-95 degrees C, the damaged cell wall still reduced the digestion rate but did not reduce the digestion extent compared to the starch counterpart. The results suggest that controlling hydrothermal processing temperature is a viable approach to develop potato ingredients with enhanced nutritional functionality.
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