| Abstract: | The upper shoot on decapitated rose branches ( Rosa hybrids cv. Marimba) grows faster than lower shoots on the same branch. Transport of radioactive assimilates to the upper shoot is higher than to the lower ones. Darkening of the uppermost shoot resulted in the reduction of growth and I4C-assimilate accumulation in the darkened shoot as well as the promotion of growth and 14C transport to the lower 2 shoots, thereby rendering dominance to the second shoot. Benzyladenine treatment to the uppermost shoot reversed the effect of darkening and restored the apical control of this shoot. |
