Abstract: | Darkness and GA3 stimulate the elongation of the first internodebut inhibit the production of roots while IAA inhibits internodalelongation but promotes the production of roots on epiphyllousbuds of Bryophylhum tubiflorum. Cycloheximide inhibits both,implicating the synthesis of proteins in the growth of bothroot and shoot. Even pre-treatment of buds with cycloheximidefor 4 h inhibits rooting as well as internodal elongation whenthese are subsequently transferred to IAA or GA3. On the otherhand, pre-treatment with IAA or GA3 even for 8 h does not alleviatethe inhibitory effect of cycloheximide suggesting that thereis a lag period between the application of these regulatorsand the synthesis of proteins caused by them. |