© 1986 Heron Publishing—Victoria, Canada
Effect of GA4 + 7 on the initiation and development of the inflorescence bud of evergreen azalea
Monique Bodson
Centre de Physiologie Végétale Appliquée (I.R.S.I.A.) Département de Botanique, B22. Université de Liège, Sart Tilman, B-4000
Liège, Belgium / Received January 14, 1986
Summary
Apical buds of evergreen azalea (Rhododendron sp.) were treated with GA4 + 7 at different stages of development. Treatment of vegetative buds stimulated shoot growth, slightly delayed both flower initiation
and development, but increased the number of flower primordia. Treatment at the time of floral transition induced bud abortion
at an early stage of the reproductive development. Treatment of inflorescence buds which contained at least one complete flower
substituted for chilling in overcoming dormancy and prevented inflorescence bud abortion.
