Lactobacillus reuteri CRL 1100 as starter culture for wheat dough fermentation. Research articles.

GEREZ C.L., CUEZZO S. ROLLÁN G., FONT DE VALDEZ G.

FOOD MICROBIOLOGY

Elsevier Ltd.

Lugar: Amsterdam. The Netherlands.; Año: 2008 vol. 25 p. 253 - 259

0740-0020

The effect of sucrose on the fermentation balance of Lactobacillus reuteri CRL 1100 and the invertase activity of this strain in wheat dough and culture medium (MRSs) was evaluated. The enzyme activity was dependent on the environmental pH releasing glucose and fructose from sucrose hydrolysis. Glucose was used as carbon source, while fructose was mainly used as electron acceptor to produce mannitol up to 10 h of fermentation. Thereafter, fructose seemed to be metabolized by the heterofermentative pathway, which determined an increase in the concentration of acetate (6 mmol l1), lactate (2 mmol l1) and ethanol (1 mmol l1) and the lack of mannitol formation after glucose depletion. The fermentation balance of Lb. reuteri CRL 1100 during the dough fermentation resulted in lower (63%) ethanol, higher (75%) acetate production and soluble carbohydrates concentrations, like MRSs cultures. This fermentation profile would be important to obtain an optimal growth of yeast and the optimal bread flavor and taste.