Coculture with specific bacteria enhances survival of Lactobacillus plantarum NC8, an autoinducer-regulated bacteriocin producer, in olive fermentations

Jose Luis Ruiz-Barba*, Belen Caballero-Guerrero, Antonio Maldonado-Barragan, Rufino Jimenez-Diaz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

Bacteriocin production in Lactobacillus plantarum NC8 is activated by coculture with specific bacteriocin production-inducing bacterial strains. The system is further regulated by a three-component regulatory system involving a specific autoinducer peptide (PLNC8IF). We have used L plantarum NC8 as a starter culture in Spanish-style green olive fermentations and examined the influence of coculturing in its survival. We found that L plantarum NC8 greatly enhanced its growth and survival in the olive fermentations when coinoculated with two specific bacteriocin-production inducing strains, i.e. Enterococcus faecium 6T1a-20 and Pediococcus pentosaceus FBB63, when compared to singly-inoculated fermentations. In addition, a constitutive bacteriocin-producer NC8-derivative strain was used as a control in the olive fermentations and showed also better viability than the parental NC8 strain. Our results suggest the involvement of bacteriocin production in the viability enhancement found in both cases. We postulate that the presence of specific bacteria is recognized by L plantarum NC8 as an environmental stimulus to switch a specific adaptive response on, most probably involving bacteriocin production. The design of novel bacteriocin-producing starter cultures for food fermentations should consider their constitutive versus regulated character. (C) 2009 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)413-417
Number of pages5
JournalFood microbiology
Volume27
Issue number3
DOIs
Publication statusPublished - May 2010

Keywords

  • Lactobacillus plantarum
  • Bacteriocin
  • Induction
  • Coculture
  • Fermentation
  • GRAM-POSITIVE BACTERIA
  • GENETIC-CHARACTERIZATION
  • LISTERIA-MONOCYTOGENES
  • FERMENTED SAUSAGE
  • LPCO10
  • PURIFICATION
  • SELECTION
  • PEDIOCIN
  • CULTURE
  • STRAIN

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