Abstract
The effect of ancymidol (A-Rest) applications and phosphorus nutrition on shoot and root growth and the development of lower leaf senescence in Easter lilies (Lilium longiflorum Thunb.) was examined. Ancymidol delayed flowering in the first but not in the second experiment. Bud count was not affected by application method of ancymidol. Plant height and shoot and root dry weight were reduced with 0.25 and 0.50 mg/15 cm pot ancymidol concentrations. Leaf senescence was increased by ancymidol, the effects of drench application being more severe than those of the foliar spray treatment. The phosphorus content of leaves and roots was not influenced by ancymidol. Phosphorus nutrition did not affect flowering, bud count or plant height but significantly affected dry weight and phosphorus content of roots and shoots. In the second experiment leaf senescence was reduced by high applications of phosphorus.
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