Volume 45 Number 3 Article 7
Year 1991 Month 7
Title: Stimulation of Lateral Branch Development on Tissue Culture-derived Apple Trees
Authors: K.H. Al-Juboory, D.J. Williams and R.M. Skirvin
Abstract:
Rooted tissue culture-derived (TCD) apple
(Malus Xdomestica Borkh.) plants (15 cm tall)
of 'Gala' and 'Royal Gala* were either pruned or
left unpruned and treated with dikegulac at 5
levels (0, 500, 1000, 1500, 2000 mg/L). Controls
were treated with water.
Dikegulac-treated plants
produced up to 6 branches per stem.
Control
plants did not branch.
The longest branches
were observed at the 500 mg/L treatment level.
Branch length decreased as the dikegulac con
centration increased.
Following branch measure
ment all plants were pruned to soil level and
regrowth was examined twenty weeks later.
The regrowth length of dikegulac-treated plants
was about twice that of control.
Leaf area and
stem diameter of dikegulac-treated plants were
significantly larger than control.
These results
suggest that dikegulac can be used to obtain
high quality multiple-branched apple trees.
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