Sufficiently developed plants were transferred to three
different rooting media, which differed in the presence of
auxin (IBA), sucrose and MS concentration. The results
show, that the best rooting medium was very specific for each
studied genotype. The results obtained by Horn et al. (1988)
show that success of in vitro rooting of roses is strongly
dependent on cultivar. The first genotype developed 82%
of rooted plants on the medium with 1/2 MS supplemented
with 30 g/L of sucrose and no IBA added after 24 days. The
most successful rooting for second genotype (55.6% plants
with developed roots) was obtained on the rooting medium
with full strength MS, supplemented with 30 g/L sucrose and
0.5 mg/L IBA. The third genotype rooted most successfully
(65.9% plants with developed roots) on the medium with 1/4
MS supplemented with 30 g/L of sucrose and no IBA added
(Fig. 2).