Answers are grounded in this paper and cite their sources.
The presence of extrachromosomal DNA elements has been investigated in 10 strains of Lactobacillus plantarum. 8 of the strains contained from 1 to 6 plasmids of different Mr values spanning from 1.35 · 106 to 15.4 · 106. 6 of the strains are commonly used as starter cultures in dry sausage and all these strains contained plasmids. The remaining 4 strains were obtained from the American Type Culture Collection and only 2 of these strains were found to harbour plasmids.
No takes yet. Share an insight, caveat, or question.
Ingolf F. Nes (1984) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: