Affiliation:
1. Department of Food Science and Nutrition, University of Minnesota, St. Paul, Minnesota 55108
Abstract
It has been previously observed that loss of plasmid pGK4101 occurred concomitantly with loss of lactose-fermenting ability in
Streptococcus lactis
subsp.
diacetylactis
18-16. Transfer of this 41-megadalton plasmid to LM0230, a lactosenegative (Lac
−
) strain of
S. lactis
, required cell-to-cell contact and resulted in a conversion of LM0230 to the Lac
+
phenotype. This confirms the linkage of lactose-fermenting ability to the 41-megadalton plasmid in
S. lactis
subsp.
diacetylactis
and, in addition, demonstrates transfer by a process resembling conjugation in the group N streptococci.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
Cited by
55 articles.
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