Rodriguez-Lemoine V, Jacob A E, Hedges R W, Datta N
J Gen Microbiol. 1975 Jan;86(1):111-4. doi: 10.1099/00221287-86-1-111.
Transfer of plasmids of group S is much more efficient at low temperatures (e.g. 22 degrees C) than at 37 degrees C. This is due to failure of the donor strain to produce the transfer system during growth at the higher temperature.