Artículo
Phage-resistance linked to cell heterogeneity in the commercial strain Lactobacillus delbrueckii subsp. lactis Ab1
Suárez, Viviana Beatriz; Maciel, Natalia; Guglielmotti, Daniela Marta
; Zago, Miriam; Giraffa, Giorgio; Reinheimer, Jorge Alberto
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
12/2008
Editorial:
Elsevier Science
Revista:
International Journal of Food Microbiology
ISSN:
0168-1605
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The aim of this work was to study the relationship between the cell morphological heterogeneity and the phage-resistance in the commercial strain Lactobacillus delbrueckii subsp. lactis Ab1. Two morphological variants (named C and T) were isolated from this strain. Phage-resistant derivatives were isolated from them and the percentage of occurrence of confirmed phage-resistant cells was 0.001% of the total cellular population. Within these phage-resistant cell derivatives there were T (3 out of 4 total isolates) and C (1 out of 4 total isolates) variants. The study of some technological properties (e.g. proteolytic and acidifying activities) demonstrated that most of phage-resistant derivatives were not as good as the parental strain. However, for one derivative (a T variant), the technological properties were better than those of the parental strain. On the other hand, it was possible to determinate that the system of phage-resistance in the T variants was interference in adsorption step, with adsorption rates < 15%. For the C variant derivative it was possible to demonstrate the presence of a restriction/modification system and, moreover, to determinate that this system could be Type I R/M.
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Articulos(INLAIN)
Articulos de INST.DE LACTOLOGIA INDUSTRIAL
Articulos de INST.DE LACTOLOGIA INDUSTRIAL
Citación
Suárez, Viviana Beatriz; Maciel, Natalia; Guglielmotti, Daniela Marta; Zago, Miriam; Giraffa, Giorgio; et al.; Phage-resistance linked to cell heterogeneity in the commercial strain Lactobacillus delbrueckii subsp. lactis Ab1; Elsevier Science; International Journal of Food Microbiology; 128; 2; 12-2008; 401-405
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