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Endogenous cyto kinins in bougainvillea cultivar san diego red 3. effect of photoperiod and gibberellic acid on flowering and cyto kinin levels



Endogenous cyto kinins in bougainvillea cultivar san diego red 3. effect of photoperiod and gibberellic acid on flowering and cyto kinin levels



Botanical Gazette 141(3): 248-251



Bougainvillea San Diego Red plants, subjected to nine 8 h photoinductive cycles, showed a decrease in endogenous cytokinin levels. This decrease occurred in all plant tissues but was least pronounced in the shoot tips, establishing them as the primary site for active nutrient mobilization. The decrease could be correlated with flower development. Application of GA3 to plants growing under short-day conditions reversed the flowering response and caused an increase in endogenous cytokinin levels similar to those detected in vegetative plants grown under long-day conditions. Gibberellins may play an important role in maintaining Bougainvillea plants in a vegetative state.

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