Physiological studies on Origanum majorana L. 1-Effect of gibberellic acid and kinetin on growth and oil yield production [electronic resource].

Includes reference.

The present study was designed to study the effect of Gibberellic Acid (GA₃) with concentrations 50,100,150 and 200 mgl⁻¹and Kinetin with concentrations 10, 20, 50 and 'mo mgl⁻¹ and the control treatment on the vegetative growth and quantity of the essential oil of Origanum majorana l. Plants. The experiment was carried out during 2005 and 2006 growing seasons in the Flowers and Omamental Plants Research Gardens, Department of Floriculture & Ornamental Horticulture and Garden Design, Faculty of Agriculture, Alexandria University Alex.,Egypt. The results of this work can be summerized as; GA₃ at the rate of 100 and/or150 mgl⁻¹ had the most effect on (plant height, number of branches/plant. number of leaves, total fresh weight/plant, oil percentage in leaves) and 100 mgl⁻¹ (GA₃) gave the highest oil percentage in racemes in both seasons. Also kinetin at the rate of 50 and/or100 mgl⁻¹ gave the largest number of branches, the highest number of lIeaves, the heaviest total fresh weight, the highest leaves area, the highest values of total chlorophyll content and the highest oil percentage in leaves and Kinetin at the rate of 10 mgl⁻¹ gave the highest oil percentage in racemes.

Summary in Arabic.

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