title: Genomic diversity of Oenococcus oeni from different winemaking regions of Portugal.
abstract: Oenococcus oeni is an alcohol-tolerant, acidophilic lactic acid bacterium that plays an important role in the elaboration of wine. It is often added as a starter culture to carry out malolactic conversion. Given the economic importance of this reaction, the taxonomic structure of this species has been studied in detail. In the present work, phenotypic and molecular approaches were used to identify 121 lactic acid bacteria strains isolated from the wines of three winemaking regions of Portugal. The strains were differentiated at the genomic level by M13-PCR fingerprinting. Twenty-seven genomic clusters represented by two or more isolates and 21 single-member clusters, based on an 85% similarity level, were recognized by hierarchic numerical analysis. M13-PCR fingerprinting patterns revealed a high level of intraspecific genomic diversity in O. oeni. Moreover, this diversity could be partitioned according to the geographical origin of the isolates. Thus, M13-PCR fingerprint analysis may be an appropriate methodology to study the O. oeni ecology of wine during malolactic fermentation as well as to trace new malolactic starter cultures and evaluate their dominance over the native microbiota.
authors.affiliation: Institute of Experimental Biology and Technology-IBET and Institute of Chemical and Biological Technology-ITQB, New University of Lisbon, Oeiras, Portugal. amarques@itqb.unl.pt
authors.forename: Ana P
authors.initials: AP
authors.lastname: Marques
authors.forename: Ana J
authors.initials: AJ
authors.lastname: Duarte
authors.forename: Lélia
authors.initials: L
authors.lastname: Chambel
authors.forename: Maria F
authors.initials: MF
authors.lastname: Teixeira
authors.forename: Maria V
authors.initials: MV
authors.lastname: San Romão
authors.forename: Rogério
authors.initials: R
authors.lastname: Tenreiro
mesh_terms: D016172:DNA Fingerprinting; D004269:DNA, Bacterial / Q000145:classification / Q000235:genetics*; D005285:Fermentation; D005516:Food Microbiology; D014644:Genetic Variation; D016680:Genome, Bacterial; D023281:Genomics; D005810:Multigene Family; D056585:Oenococcus / Q000145:classification / Q000201:enzymology / Q000235:genetics* / Q000302:isolation & purification; D010802:Phylogeny; D058974:Phylogeography; D016133:Polymerase Chain Reaction; D011174:Portugal; D014920:Wine / Q000382:microbiology*
chemical_list: D004269:DNA, Bacterial