Components of Axillary Bud Inhibition in Rose Plants. I. The Effect of Different Plant Parts (Correlative Inhibition)

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Abstract
Different plant parts inhibited the growth of axillary buds in ''Baccara'' roses [Rosa hybrida]. A segment of stem inhibited growth of buds just below. Removal of the uppermost bud enhanced the sprouting of the bud immediately below, but buds lower down were unaffected by removing 2 or more upper buds. Both mature leaves and the stem itself played a role in this correlative inhibition. Removal of a leaf enhanced the sprouting of the bud subtended by this leaf, although subsequent grouth was reduced relative to that of a shoot whose subtending leaf had not been removed. The stem section above a bud had an effect similar to the leaf subtending the bud. The combined initial inhibitory effect of the stem section and leaf was more than additive.

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