01223naa a2200181 a 450000100080000000500110000800800410001910000220006024501040008226000090018652006990019570000200089470000200091470000180093470000160095270000180096877300550098616487382000-04-03       1999    bl ---       0--  u    #d1 aTURBULL, C. G. N.  aRoutes of ethepon uptake in pineapple (Ananas comosus) and reasons for failure of flower induction.  c1999  aEthylene-releasing agents such as ethephon (2-chloroethylphosponic acid) are used widely to induce flowering in pineapples (Ananas comosus (L.) Merrill). However, ethephon treatment is less reliable in summer, particularly if plants are treated on abnormally hot days. [14C]ethephon was used to follow uptake and translocation in leaf tissues. Up to 30% of the ethephon entered the leaf within 4 h, and up to 60% by 24h. Uptake was dramatically modified by temperature, relative humidity, solution pH, and the surface on which solution droplets were placed. Entry occured across the leaf cuticle and probably also by way of stomatal pores, and label was recovered at all depths within the leaf.1 aSINCLAIR, E. R.1 aANDERSON, K. L.1 aNISSEN, R. J.1 aSHORTER, A.1 aLANHAM, T. E.  tJournal Plant Growth Regulgv.18, p.145-152, 1999.