Abstract
This study was conducted on the seeds of Pinus eldarica during the period from February 2020 to September 2021 to find out the effect of cold stratification at (⁰4C) for (60 days) and different concentrations of gibberellic acid (0, 200,400 mg. L-1) in the traits of the vegetative and root growing seedlings. The results showed the superiority of the stratified seeds for the characteristics (seedling height, stem diameter, number of branches, number of leaves, root length, dry weight of the vegetative growth, dry weight of the root system). The results of dipping in gibberellic acid showed a superior concentration (400 mg.L-1) for traits (seedlings height, leaves number, length of the main root, dry weight of the shoot, dry weight of the root system). The concentration of 200 mg.L-1 for the two traits (stem diametet, branches number) was superior. The results of the binary interaction of stratification and gibberellic acid showed superiority of the stratified seeds with two concentrations (400 mg.L-1 and 200 mg.L-1) for traits (seedling height, eaves number, length of main root, dry weight of shoot, dry weight of root) and (Stems diameter Branches number) respectively.
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