Enhancement of beaucarnea recurvata lem. growth by some growth regulators
2009
Abdel-Wahid, S.M.K. | Sweify, S.G.
The response of Beaucarnea recurvutu plants to the application of gibberellic acid (GA3) and henzyladenine (BA) as a soil drench in a plastic house was studied during the two successive seasons of 2005 / 2006 and 2006 / 2007 at the nursery of Ornamental Plants Research and Landscape Gardening Department, Horticultural Research Institute, Agricultural Research Center, Giza, Egypt. The concentrations used were 200, 300 or 500 ppm for GA3 and.50, 100 or 200 ppm for BA as well as untreated plants. The results reveal that using GA3 at 200 ppm increased the stem diameter, leaf width, carotenoids content and total carbohydrates percentage in the leaves. Increasing the level of GA3 to 300 ppm produced the heaviest fresh and dry weights of leaves. The concentration of 500 ppm of GA3 increased the plant height, number of leaves / plant and P percentage in the leaves. Also, the data indicate that BA at 50 ppm increased Leaf length and chlorophyll (a) content in the leaves. The concentration of 100 ppm BA caused an increase in potassium percentage in the leaves. However the concentration of 200 ppm resulted in the least number of leaves/ plant, fresh and dry weights of levees, chlorophyll (h) and total chlorophylls content in the leaves. So, to accelerate the growth of Beaucurnea recurvata plant it should he treated with GA3 at the rate of 400 ppm as a soil drench.
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