Phytate negatively influences wheat dough and bread characteristics by interfering with cross-linking of glutenin molecules

Eun Young Park, E. Patrick Fuerst, Byung Kee Baik

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The influence of added phytate on dough properties and bread baking quality was studied to determine the role of phytate in the impaired functional properties of whole grain wheat flour for baking bread. Phytate addition to refined flour at a 1% level substantially increased mixograph mixing time, generally increased mixograph water absorption, and reduced the SDS-unextractable protein content of dough before and after fermentation as well as the loaf volume of bread. The added phytate also shifted unextractable glutenins toward a lower molecular weight form and increased the iron-chelating activity of dough. It appears that phytate negatively affects gluten development and loaf volume by chelating iron and/or binding glutenins, and consequently interfering with the oxidative cross-linking of glutenin molecules during dough mixing. Phytate could be at least partially responsible for the weak gluten network and decreased loaf volume of whole wheat flour bread as compared to refined flour bread.

Original languageEnglish
Pages (from-to)199-206
Number of pages8
JournalJournal of Cereal Science
Volume70
DOIs
Publication statusPublished - 2016 Jul 1

Keywords

  • Bread quality
  • Chelating capacity
  • Dough property
  • Phytate

ASJC Scopus subject areas

  • Food Science
  • Biochemistry

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