EFFECT OF PH AND THE BACTERIOCIN CARNOCIN-54 ON GROWTH AND CELL MORPHOLOGY OF 2 LEUCONOSTOC STRAINS

Authors
BECKER B HOLZAPFEL WH VONHOLY A
Citation
B. Becker et al., EFFECT OF PH AND THE BACTERIOCIN CARNOCIN-54 ON GROWTH AND CELL MORPHOLOGY OF 2 LEUCONOSTOC STRAINS, Letters in applied microbiology, 19(3), 1994, pp. 126-128
Citations number
9
Categorie Soggetti
Microbiology,"Biothechnology & Applied Migrobiology
Journal title
Letters in applied microbiology → ACNP
ISSN journal
02668254
Volume
19
Issue
3
Year of publication
1994
Pages
126 - 128
Database
ISI
SICI code
0266-8254(1994)19:3<126:EOPATB>2.0.ZU;2-6
Abstract
Leuconostoc carnosum LA54A produces carnocin 54, a bacteriocin inhibit ory to Listeria and closely related lactic acid bacteria. The effects of the pH of cell-free LA54 culture supernatants on the antibacterial activity of carnocin 54 was assessed using Leuc. mesenteroides DSM 203 43 and TA10C as indicator strains. Carnocin 54 showed greatest activit y against both strains at pH 4.5. At pH 6.5, activity was reduced, esp ecially against Leuc. mesenteroides TA10C. Scanning electron microscop y showed irregular and rough surfaces on bacteriocin-treated cells at both pH values.