ISHS Acta Horticulturae 279: III International Workshop on Temperate Zone Fruits in the Tropics and Subtropics
THE EFFECTS OF PACLOBUTRAZOL ON THE GROWTH AND MOVEMENT OF 14C LABELLED ASSIMILATES IN RED DELICIOUS APPLE SEEDLINGS |
| Authors: | M.H. El Hodairi, A.E. Canham |
| Abstract:
Sprays of paclobutrazol at 500 mgl-1 on 12 week old Red Delicious apple seedlings significantly reduced vegetative growth and increased root : shoot ratios. Root dry weight, relative growth rate, net assimilation rate and leaf area ratio were not affected. The reduction in shoot growth was associated with a redistribution of 14C-labelled assimilates in the plant. The response was greatest one day after treatment but was still evident 14 days later and to a lesser extent 28 days after treatment. | |
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