Effects of sourdough on rheological properties of dough, quality characteristics and staling time of wholemeal wheat croissants

The present study aimed to obtain good quality croissants from wholegrain wheat flour using baking sourdoughs prepared from single starter cultures of Pediococcus acidilactici 02P108 (PA), Pediococcus pentosaceus SM2D17 (PP) and Enteroccocus durans 09B374 (ED) as an attempt to overcome the usual negative effects of the wholegrain flour on the characteristics of this specific bakery product group. Results showed that the addition of sourdough in the wholegrain wheat dough had similar performance as that of conventional baker's yeast regarding the rheo-logical characteristics of dough. The dynamic viscosity of all sourdough-leavened samples remained higher than that of the control sample at all tested shear rates. A positive effect of sourdoughs used on the development of baking dough was observed in terms of specific volume improvement, higher degree of softening, and reduced baking loss. However, these positive effects were found as strain-specific. The use of Enteroccocus durans 09B374 -made sourdough showed the most distinguished sensory characteristics and the best results regarding croissant staling during storage. The study demonstrated that sourdoughs used in wholemeal wheat croissant dough had positive effect on the quality characteristics and shelf-life of products. However, strain selection proved as of key importance for the successful production of wholemeal wheat croissants.