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Plant Physiology 54:404-407 (1974)
© 1974 American Society of Plant Biologists

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Articles

Enhanced Inflorescence Development in Bougainvillea "San Diego Red" by Removal of Young Leaves and Cytokinin Treatments

Anthony T. Y. Tse, Angelo Ramina1, Wesley P. Hackett and Roy M. Sachs

a Department of Environmental Horticulture, University of California, Davis, California 95616

Removal of young leaves and application of the cytokinin, N-benzyla-{alpha}-(tetrahydro-2H-pyran-2yl)-adenine promote inflorescence development in Bougainvillea "San Diego Red". Defoliation greatly increased the amount of assimilate accumulated at the shoot tip 1 to 2 days after treatment. Cytokinin applications further increased the amount accumulated and this increase was apparent 4 days before morphological changes could be detected at the inflorescence axes. Short days promoted inflorescence development and also increased assimilate accumulation at the reproductive axes; thus, it is suggested that the role of short day induction in bougainvillea may be that of redirecting the flow of assimilates, perhaps by its influence on cytokinin synthesis and distribution.

1 Research Fellow, Consiglio Nazionale delle Ricerche, Italy. Present address: Institute of Pomology, University of Padua, Padua 35100 Italy.






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Copyright © 1974 by the American Society of Plant Biologists