Abstract
Infection of young wounded leaves of Kalanchoe daigremontiana with A. tumefaciens B6 results in tumor formation, with A. tumefaciens T37 in teratoma formation, and with A. rhizogenes 15834 in root induction. Infections with mixtures of a constant concentration of 15834 and varying amounts of T37 result in the formation of a constant number of roots, whereas the number of induced teratomas depends on the concentration of T37. On the other hand if leaves are infected with a constant concentration of T37 and varying amounts of 15834, the number of teratomas is constant for all mixtures studied, the number of roots varies with the 15834 concentration. More than 60 % of all wounds carry teratomas plus roots. Analogous results are obtained by infections with mixtures of B6 with 15834 or T37 respectively. So it seems proof that at least 2 different transformations can take place at one wound. Competition for tumor sites could not be seen with the bacterial concentrations studied.
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