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Evidence for the conjugal transfer of the broad host range plasmid pIP501 into strains of Lactobacillus helveticus
Author(s) -
Thompson J.K.,
Collins M.A.
Publication year - 1988
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1988.tb01897.x
Subject(s) - lactobacillus helveticus , plasmid , lactobacillus , microbiology and biotechnology , streptococcus thermophilus , biology , enterococcus faecalis , strain (injury) , starter , bacteria , streptococcus , fermentation starter , lactic acid , food science , genetics , dna , staphylococcus aureus , anatomy
The conjugative broad host range plasmid pIP501 was transferred from Streptococcus faecalis to a series of strains of lactic streptococci used commercially as dairy starter cultures. With these transconjugants as donors the plasmid was exconjugated to two strains of Lactobacillus helveticus and a commercially used strain of Strep, thermophilus. There was evidence that the plasmid could transfer between isogenic derivatives of one of the strains of Lact. helveticus. Transfer from Lact. helveticus to Strep. faecalis was also detected but at a low frequency. There was no evidence for the conjugal transfer of plasmid pIP501 into a strain of Lact. bulgaricus by exconjugation from either lactic streptococci or Lactobacillus sp.