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Influence of Environmental Factors on Bacteriocin Production by Human Isolates of Lactococcus lactis MM19 and Pediococcus acidilactici MM33

Turgis, Mélanie; Vu, Khanh Dang; Millette, Mathieu; Dupont, Claude; Lacroix, Monique (2016). Influence of Environmental Factors on Bacteriocin Production by Human Isolates of Lactococcus lactis MM19 and Pediococcus acidilactici MM33 Probiotics and Antimicrobial Proteins , vol. 8 , nº 1. p. 53-59. DOI: 10.1007/s12602-015-9204-8.

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Résumé

The influence of temperature, initial pH, and carbon and nitrogen sources on bacteriocin secreted by Lactococcus lactis MM19 (MM19) and Pediococcus acidilactici MM33 (MM33) was evaluated. It was found that 30 and 45 °C were the growth temperatures for higher nisin and pediocin production by MM19 and MM33, respectively. The initial pH values for higher production of nisin and pediocin were 9 and 6, respectively. Glucose and wheat peptone E430 were found as suitable carbon and nitrogen sources, respectively, for highest nisin production by MM19 at 30 °C and initial pH of 9. In these conditions, nisin production could be increased by 6.7 times as compared to the control medium (de Man, Rogosa, and Sharpe—MRS broth). Similarly, fructose and pea peptone were suitable carbon and nitrogen sources, respectively, for highest production of pediocin by MM33 at 45 °C and initial pH of 6. In these conditions, pediocin production by MM33 was increased by three times as compared to the control medium (tryptone-glucose-yeast extract—TGE broth). © 2015, Springer Science+Business Media New York.

Type de document: Article
Mots-clés libres: Culture media; Lactococcus lactis; Nisin; Pediocin; Pediococcus acidilactici
Centre: Centre INRS-Institut Armand Frappier
Date de dépôt: 06 oct. 2017 14:27
Dernière modification: 06 oct. 2017 14:27
URI: http://espace.inrs.ca/id/eprint/4590

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