Abstract:
: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.
journal_name
Int J Food Microbioljournal_title
International journal of food microbiologyauthors
Suárez VB,Maciel N,Guglielmotti D,Zago M,Giraffa G,Reinheimer Jdoi
10.1016/j.ijfoodmicro.2008.09.007subject
Has Abstractpub_date
2008-12-10 00:00:00pages
401-5issue
2eissn
0168-1605issn
1879-3460pii
S0168-1605(08)00493-5journal_volume
128pub_type
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journal_title:International journal of food microbiology
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journal_title:International journal of food microbiology
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journal_title:International journal of food microbiology
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journal_title:International journal of food microbiology
pub_type: 杂志文章
doi:10.1016/j.ijfoodmicro.2013.01.015
更新日期:2013-04-01 00:00:00
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pub_type: 杂志文章,评审
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journal_title:International journal of food microbiology
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journal_title:International journal of food microbiology
pub_type: 杂志文章
doi:10.1016/j.ijfoodmicro.2017.03.023
更新日期:2017-06-19 00:00:00
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journal_title:International journal of food microbiology
pub_type: 杂志文章
doi:10.1016/j.ijfoodmicro.2018.11.022
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journal_title:International journal of food microbiology
pub_type: 杂志文章
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