5. Conclusion
Cereal raw material is an interesting source of LAB. We selected
eight strains of LAB from different raw material based on vitamin
production, acidifying power, proteolysis and antimicrobial activity.
E. mundtii ES32 and ES63, Lb. pentosus ES124 and Lb. plantarum
ES137 are folate producers. Lb. pentosus ES124 is a powerful acidi-
fier strain and a good vitamin producer that allow us to postulate
and evaluate it as a sourdough starter. It could be combined with
another selected bacteriocin producer strain since it is resistant to
all bacteriocins evaluated in inhibition assays. E. faecium ES216
produces the most powerful bacteriocin with activity against Lis-
teria and furthermore has shown proteolytic activity. It could
decrease the pH of SFE to 4 in 24 h. This is other selected strain to be
evaluated in sourdough production. Another interesting strain is Lb.
fermentum ES148 which has high acidification power and proteo-
lytic activity. P. acidilactici ES22 has shown proteolytic activity and
salt tolerance. E. mundtii ES198 is a bacteriocin producer strain.
These factors allow us to postulate these strains of different species
of LAB as potential starters in sourdough production and to be used
their antimicrobial peptides to improve the safety of the final
products.