Tumor formation and rhizogenicity of Agrobacterium rhizogenes carrying Ti plasmids

Octopine Ti plasmids were introduced into different Agrobacterium rhizogenes strains. Transconjugants became able to utilize octopine and to induce aberrant tumors, the surface of which was all covered wioth roots of different size and morphology. The plasmids endogenous in A. rhizogenes were shown to be compatible with incRH-1 Ti plasmids.