| Registro completo |
| Provedor de dados: |
Rev. Microbiol.
|
| País: |
Brazil
|
| Título: |
Detection and characterization of bacteriocin-producing Lactococcus lactis strains
|
| Autores: |
Moreno,Izildinha
Lerayer,Alda L.S.
Leitão,Mauro F. de Freitas
|
| Data: |
1999-04-01
|
| Ano: |
1999
|
| Palavras-chave: |
L. lactis
Bacteriocins
Fermentation
Plasmids
|
| Resumo: |
One hundred sixty seven strains of Lactococcus lactis were screened for bacteriocin production by well diffusion assay of GM17 agar. Fourteen (8.4%) produced antimicrobial activity other than organic acids, bacteriophages or hydrogen peroxide. The frequency of bacteriocin production ranged from 2% in L. lactis subsp. cremoris up to 12% in L. lactis subsp. lactis. Antimicrobial activities were not observed in any strain of L. lactis subsp. lactis var. diacetylactis. Among thirteen bacteriocin-producing strains and two nisin-producing strains (L. lactis subsp. lactis ATCC 11454 and L. lactis subsp. lactis CNRZ 150), eight (53%) were characterized as lactose-positive (Lac+) and proteinase-negative (Prt-). The bacteriocin-producing cultures were also characterized on the basis of plasmid content. All strains had 2 to 7 plasmids with molecular weights varying from 0.5 to 28.1 Mdal. Four strains (ITAL 435, ITAL 436, ITAL 437 and ITAL 438) showed identical profiles and the other were quite distinct.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Inglês
|
| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000200008
|
| Editor: |
Sociedade Brasileira de Microbiologia
|
| Relação: |
10.1590/S0001-37141999000200008
|
| Formato: |
text/html
|
| Fonte: |
Revista de Microbiologia v.30 n.2 1999
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
