Changes in cultivar-specificity toward pea can result from transfer of plasmid RP4 and other incompatibility group P1 replicons to Pseudomonas syringae pv. pisi.

Transfer of RP4 and related replicons belonging to the Escherichia coli incompatibility group P (Pseudomonas aeruginosa IncP1) to races 2 and 6 of P. syringae pv. pisi was associated with the creation of two types of transconjugant, one resembling the parental race and the other showing an altered cultivar-specificity towards pea. The latter, irrespective… CONTINUE READING