Barotolerance is inducible by preincubation under hydrostatic pressure cold-, osmotic- and acid-stress conditions in Lactobacillus sanfranciscensis DSM 20451T

C. H. Scheyhing, S. Hörmann, M. A. Ehrmann, R. F. Vogel

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

Aims: This study addresses the inducibility of barotolerance by preincubation of Lactobacillus sanfranciscensis DSM 20451T under various sublethal stress conditions. Methods and Results: Stress conditions which reduce the growth rate of L. sanfranciscensis DSM 20451T to 10% of its maximum were determined. These conditions were met at 43, 12.57deg;C, a pH value of 3.7, 1.9% NaCl, or 80 MPa respectively. In contrast to heat preincubation, other prestresses, including salt, cold and pressure led to an increase of barotolerance by hydrostatic pressure of 300 MPa for 30 min. Stationary-phase cells also showed an increased barotolerance. Sublethal pressure leads to enhanced heat tolerance. Conclusions: Stress response to salt, low temperature and acidic pH as well as starvation overlap with that one to high pressure by inducing barotolerance. Significance and Impact of the Study: Inactivation of bacteria by high pressure treatment is influenced by their history which modulates barotolerance. Mechanisms of barotolerance appear different from heat shock defence.

Original languageEnglish
Pages (from-to)284-289
Number of pages6
JournalLetters in Applied Microbiology
Volume39
Issue number3
DOIs
StatePublished - 2004
Externally publishedYes

Keywords

  • Barotolerance
  • Cross protection
  • Food microbiology
  • Hydrostatic pressure treatment
  • Lactobacillus sanfranciscensis
  • Preservation

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