Open AccessRapid Differentiation and In Situ Detection of 16 Sourdough Lactobacillus Species by Multiplex PCR
Author(s) -
Luca Settanni,
Douwe van Sinderen,
J. Rossi,
Aldo Corsetti
Publication year - 2005
Publication title -
applied and environmental microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.552
H-Index - 324
eISSN - 1070-6291
pISSN - 0099-2240
DOI - 10.1128/aem.71.6.3049-3059.2005
Subject(s) - biology , multiplex polymerase chain reaction , multiplex , primer (cosmetics) , 16s ribosomal rna , lactobacillus , 23s ribosomal rna , lactobacillus plantarum , ribosomal rna , microbiology and biotechnology , polymerase chain reaction , gene , genetics , bacteria , chemistry , rna , lactic acid , ribosome , organic chemistry
A two-step multiplex PCR-based method was designed for the rapid detection of 16 species of lactobacilli known to be commonly present in sourdough. The first step of multiplex PCR was developed with a mixture of group-specific primers, while the second step included three multiplex PCR assays with a mixture of species-specific primers. Primers were derived from sequences that specify the 16S rRNA, the 16S-23S rRNA intergenic spacer region, and part of the 23S rRNA gene. The primer pairs designed were shown to exclusively amplify the targeted rrn operon fragment of the corresponding species. Due to the reliability of simultaneously identifying Lactobacillus plantarum, Lactobacillus pentosus, and Lactobacillus paraplantarum, a previously described multiplex PCR method employing recA gene-derived primers was included in the multiplex PCR system. The combination of a newly developed, quick bacterial DNA extraction method from sourdough and this multiplex PCR assay allows the rapid in situ detection of several sourdough-associated lactobacilli, including the recently described species Lactobacillus rossii, and thus represents a very useful alternative to culture-based methodologies.