Procedure for quantifiable assessment of nutritional parameters influencing Nisin production by Lactococcus lactis subsp. lactis

Sailaja Chandrapati, Daniel J. O'Sullivan

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

A modified rapid plate assay procedure was developed, that allowed quantifiable measurement of nisin production by Lactococcus lactis growing directly on agar media. Using this direct plate assay, several nutritional parameters were assessed for their influence on nisin production (as distinct from their influence on growth) by L. lactis subsp. lactis ATCC 11454 growing on standard M17 based media over 3 and 6 h incubation periods. Glucose was found to be the optimal carbon source tested, with glycerol having the greatest suppressive effect. The addition of salts suppressed nisin production on a per cell basis, except MnCl2. This direct plate method proved to be a good pilot assay for rapidly and quantifiably investigating the initial effects of different parameters on nisin production by L. lactis, prior to conducting more intensive broth batch culture assays. The data obtained in this study indicate that certain nutritional parameters can impose a repressive effect on nisin production. Elucidation of how these parameters control the amount of nisin produced will provide further insight into the regulation of nisin biosynthesis in L. lactis. Copyright (C) 1998 Elsevier Science B.V.

Original languageEnglish (US)
Pages (from-to)229-233
Number of pages5
JournalJournal of Biotechnology
Volume63
Issue number3
DOIs
StatePublished - Aug 27 1998

Bibliographical note

Funding Information:
We thank Larry L. McKay for informative discussions and critically reviewing this manuscript. This research was supported in part by the Minnesota Agricultural Experiment Station and the Dairy Management.

Keywords

  • Bioassay
  • Lactococcus lactis
  • Nisin
  • Regulation

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