Stimulation of Lateral Branch Development on Tissue Culture-Derived Apple Trees
DOI:
https://doi.org/10.71318/apom.1991.45.3.157Abstract
Rooted tissue culture-derived (TCD) apple ( Malus XdomesticaBorkh.) 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 concentration increased. Following branch measurement 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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