01684naa a2200229 a 450000100080000000500110000800800410001910000230006024501050008326000090018852009540019765000210115165300230117265300340119565300220122965300170125165300340126865300250130270000210132770000200134877300860136814178181993-09-18       1991    bl ---       0--  u    #d1 aNUNEZ - ELISEA, R.  aAn experimental system to study mango flowering using containerized trees propagated by airlayering.  c1991  aA method was developed to consistently induce floral differentiation in mature `Tommy Atkins' mangop trees by air-layering branches of adult, field trees. Rooting of firdled branches was induced within 12 weeks with the aid of 2% naphthaleneacetic acid in lanolin paste. Rooted air-layers were pruned and completely defoliated upon potting to regenerate the canopies. Mature, fully-expanded vegetative shoots were obtained within 100 weeks of pruning. Trees with developmentally uniform canopies were exposed to a chilling treatment of 18/10oC (day/night temperature, 12-h photoperiod). Defoliation of shoot tips stimulated initiation of apical buds. Bud break of nearly all stimulated buds occurred after 7 to 8 weeks of chilling. More than 80% of buds differentiated floral primordia. Bud meristematic activity during chilling was required for floral differentiation. Chilling induced flowering of containized trees regardless of time of the year.  aMangifera Indica  aManga - defloracao  aManga - desenvovimento floral  aManga - fenologia  aManga - poda  aManga - propagacao vegetativa  aManga - resfriamento1 aDAVENPORT, T. L.1 aCALDEIRA, M. L.  tProceedings of the Florida State for Horticultural Societygv.104, p.39-41, 1991.