Journal
FOOD CHEMISTRY
Volume 240, Issue -, Pages 626-633Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2017.07.165
Keywords
Absence of wheat glutenin subunit; Glutenin polymerization; Grain development; Dough mixing properties; Micro structure of gluten; Quantitative protein network analysis
Funding
- 'National Natural Science Foundation of China' of Northwest A F University [31501300]
- 'China Postdoctoral Science Foundation' of Northwest A F University [2016M600817]
- 'Science and Technology Innovation Team Project of Shaanxi Province, China' of Northwest A F University [2014KCT-25]
- 'Science Fund for the Cultivation of the Excellent Youth Scholars' of Northwest A F University [Z109021710]
- 'Chinese Universities Scientific Fund' of Northwest A F University [2452015009]
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Wheat (Triticum aestivum L.) dough strength and extensibility are mainly determined by the polymerization of glutenin. The number of high-molecular-weight glutenin subunits (HMW-GS) differs in various wheat varieties due to the silencing of some genes. The effects of Ax1 or Dx2 subunit absence on glutenin polymerization, dough mixing properties and gluten micro structure were investigated with two groups of near-isogenic lines. The results showed that Ax1 or Dx2 absence decreased the accumulation rate of glutenin polymers and thus delayed the rapid increase period for glutenin polymerization by at least ten days, which led to lower percentage of polymeric protein in mature grain. Ax1 or Dx2 absence significantly decreased the dough development time and dough stability, but increased the uniformity of micro structure. Lacunarity, derived from quantitative analysis of gluten network, is suggested as a new indicator for wheat quality.
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