Diversity of Plasmids of Agrobacterium tumefaciens Isolated from Fruit Trees in Poland

Plasmid DNA was isolated from 11 strains of Agrobacterium tumefadens originated from 6 fruit tree species of various locations in Poland. One to four plasmids were consistently isolated from all studied strains. Plasmid sizes varied from about 27 to about 315 kbp. Some of the strains possessed similar plasmid profiles. The lack of any clear relationship between plasmid profiles of strains and their virulence, sensitivity to agrocin 84, biovar and origin was observe