Effect of polyphenols on mixing properties and solvent retention of wheat flour doughs.

Abstract

The effect of polyphenol addition on dough mixing properties and flour functionality was examined using flours from different wheat varieties. Both the mixograph and farinograph experiments showed that polyphenol addition affected dough stability and optimum mixing time. These effects were most apparent in hard wheat flour with the addition of catechin. Water absorption was dependent on wheat variety (P < 0.0001) but not on the addition of polyphenols (P=0.54). Except for the 5g kg-1 sodium carbonate solvent retention capacity (SRC), SRC values of the flours were dependent on wheat variety but not on polyphenol addition. However, 5g kg-1 sodium carbonate SRC was significantly increased by the addition of caffeic acid and catechin. Since sodium carbonate SRC is associated with damaged starch levels, further investigations are needed to see how polyphenols influence either the absorption of a sodium carbonate solution or the starch itself. Polyphenol addition affected dough stability and optimum mixing time. Addition of catechin to hard wheat flour was most effective. Water absorption and SRC values except for 5g kg-1 sodium carbonate solvent were affected by the wheat variety, but not by polyphenol addition. © 2021 Society of Chemical Industry.