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Lipid binding of fresh and stored formulated wheat breads. Relationships with dough and bread technological performance

Abstract:

Lipid binding in fresh and stored soured started breads formulated with nonfat [sodium carboxymethylcellulose (CMC), hydroxypropylmethylcellulose (HPMC), fungal α-amylase- and fat-monoglycerides (MGL), diacetyl tartaric acid ester of mono-diglycerides (DATEM) and sodium stearoyl lactylate (SSL)] additives were determined. Results were correlated with dough and bread technological performance during breadmaking and storage. A preferential binding of the added SSL to the starch with a concomitant displacement of endogenous polar lipids from starch to gluten was observed. Monoglycerides partly bound to the starch and partial remained in the pool of free lipids with displacement of endogenous polar lipids from gluten to starch and free fractions. Addition of DATEM induced similar changes as SSL in association pattern and as MGL in polar lipid translocation. Hydrocolloids showed preferential bindings to the gluten (CMC) and to the starch (HPMC) respectively, associated to a significant displacement of endogenous neutral gluten-bounded lipids to the starchy fraction (CMC) and to a significant release of both starch- and gluten-bonded lipids (HPMC). Addition of α-amylase promoted both a release of endogenous bonded lipids and a binding of glycolipids to the starch whereas the sourer starter induced disaggregation of the starch- and gluten-lipid complexes. Suitable trends in bread lipid parameters for high fermentative power, delayed starch gelatinization, edible fresh bread and reduced bread staleness corresponded to high values of neutral lipids of bonded fractions and high total glycolipid content achieved by the incorporation of SSL and/or CMC into dough formulation.