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Resistant starch formation in temperature treated potato starches varying in amylose/amylopectin ratio

Author

  • Margareta Leeman
  • Malin Sjöö
  • Ann-Charlotte Eliasson
  • Inger Björck

Summary, in English

Two genetically modified potato starches derived from the same mother line (64%, 1% and 23% amylose, respectively) were used to study the bioavailability after various heat treatments. The conditions for the treatments were of minor importance for resistant starch (RS) formation and hydrolysis results, as compared to the proportion of amylose. A high amylose content gave lower hydrolysis index (HI) and higher amounts of RS than starches with less amylose. Retrograded amylopectin contributed to a decreased HI, although only the high amylose line showed sufficient reduction in predicted glycaemic indices (Gl). The line with high amylose content contained 25-30% RS vs. in the range of 0-5% for the other starches. Results could neither be explained by the presence of intact granules, nor by the content of retrograded amylose. Therefore, a synergistic effect between the starch components was suggested to affect the RS and starch hydrolysis. (c) 2006 Elsevier Ltd. All rights reserved.

Department/s

Publishing year

2006

Language

English

Pages

306-313

Publication/Series

Carbohydrate Polymers

Volume

65

Issue

3

Document type

Journal article

Publisher

Elsevier

Topic

  • Food Engineering
  • Nutrition and Dietetics

Keywords

  • resistant starch
  • amylopectin
  • amylose
  • potato
  • starch
  • hydrolysis

Status

Published

ISBN/ISSN/Other

  • ISSN: 0144-8617