PMID- 24010616 OWN - NLM STAT- MEDLINE DCOM- 20140319 LR - 20130909 IS - 1095-9998 (Electronic) IS - 0740-0020 (Linking) VI - 36 IP - 2 DP - 2013 Dec TI - Diversity and technological potential of lactic acid bacteria of wheat flours. PG - 343-54 LID - S0740-0020(13)00142-1 [pii] LID - 10.1016/j.fm.2013.07.003 [doi] AB - Lactic acid bacteria (LAB) were analysed from wheat flours used in traditional bread making throughout Sicily (southern Italy). Plate counts, carried out in three different media commonly used to detect food and sourdough LAB, revealed a maximal LAB concentration of approximately 4.75 Log CFU g(-1). Colonies representing various morphological appearances were isolated and differentiated based on phenotypic characteristics and genetic analysis by randomly amplified polymorphic DNA (RAPD)-PCR. Fifty unique strains were identified. Analysis by 16S rRNA gene sequencing grouped the strains into 11 LAB species, which belonged to six genera: Enterococcus, Lactobacillus, Lactococcus, Leuconostoc, Pediococcus and Weissella. Weissella cibaria, Lactobacillus plantarum, Leuconostoc pseudomesenteroides and Leuconostoc citreum were the most prevalent species. The strains were not geographically related. Denaturing gradient gel electrophoresis (DGGE) analysis of total DNA of flour was used to provide a more complete understanding of the LAB population; it confirmed the presence of species identified with the culture-dependent approach, but did not reveal the presence of any additional LAB species. Finally, the technological characteristics (acidifying capacity, antimicrobial production, proteolytic activity, organic acid, and volatile organic compound generation) of the 50 LAB strains were investigated. Eleven strains were selected for future in situ applications. CI - Copyright (c) 2013 Elsevier Ltd. All rights reserved. FAU - Alfonzo, Antonio AU - Alfonzo A AD - Department of Agricultural and Forestry Science, University of Palermo, Palermo, Italy. FAU - Ventimiglia, Giusi AU - Ventimiglia G FAU - Corona, Onofrio AU - Corona O FAU - Di Gerlando, Rosalia AU - Di Gerlando R FAU - Gaglio, Raimondo AU - Gaglio R FAU - Francesca, Nicola AU - Francesca N FAU - Moschetti, Giancarlo AU - Moschetti G FAU - Settanni, Luca AU - Settanni L LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130718 PL - England TA - Food Microbiol JT - Food microbiology JID - 8601127 RN - 0 (Acids) RN - 0 (Bacterial Proteins) RN - 33X04XA5AT (Lactic Acid) RN - EC 3.4.- (Peptide Hydrolases) SB - IM MH - Acids/metabolism MH - Bacterial Proteins/metabolism MH - *Biodiversity MH - Flour/*microbiology MH - Industrial Microbiology MH - Lactic Acid/metabolism MH - Lactobacillaceae/classification/genetics/*isolation & purification/*metabolism MH - Peptide Hydrolases/metabolism MH - Phylogeny MH - Triticum/*microbiology OTO - NOTNLM OT - Acidification OT - Lactic acid bacteria OT - Proteolysis OT - Sourdough OT - Volatile organic compounds OT - Wheat flour EDAT- 2013/09/10 06:00 MHDA- 2014/03/22 06:00 CRDT- 2013/09/10 06:00 PHST- 2013/01/08 00:00 [received] PHST- 2013/06/29 00:00 [revised] PHST- 2013/07/09 00:00 [accepted] PHST- 2013/09/10 06:00 [entrez] PHST- 2013/09/10 06:00 [pubmed] PHST- 2014/03/22 06:00 [medline] AID - S0740-0020(13)00142-1 [pii] AID - 10.1016/j.fm.2013.07.003 [doi] PST - ppublish SO - Food Microbiol. 2013 Dec;36(2):343-54. doi: 10.1016/j.fm.2013.07.003. Epub 2013 Jul 18.