Abstract:
Kolkhong (Pistacia khinjuk Stocks) is a native tree of Iran. Economically, its importance is known in the production of edible pistachio nuts when grafted with Pistacia vera. Its role in soil stabilization has been appreciably recognized in the recent past. This study concerns the determination of the effect of scarification by sulfuric acid (98%), cold stratification at 5+1°C (10, 20, 30 and 40 days) and gibberellic acid (100, 250, 500, 750 and 1000 mg L-1) on the germination of Kolkhong seeds which have a dormancy period with low germination percentage. The results showed that Kolkhong had physical and internal dormancy. Scarification of seeds using cold acid for 20 min, followed by stratification for the period of 30-40 days or soaked in concentrations of 500-1000 mg L