Environmental Factors involved in the Regulation of Sprouting of Basal Buds in Rose Plants

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Abstract
The plant top is the main factor inhibiting the formation of juvenile-like shoots from the basal part of the rose plant. In plants with the whole top removed a cooling period of one week at 4 °C had a promotional effect on the outgrowth of basal buds. Six days of darkness partially inhibited sprouting of these buds and 9 d suppressed sprouting completely. On the other hand. 3 d in light following plant top removal were sufficient to cause sprouting. Buds on the upper parts of lateral shoots were not affected by the dark treatment.

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