This research was conducted to evaluate the effects of gibberellic acid (100,250,500,750,100 mgL1) on seedling growth and development of (P.mutica F.&M.) and (P.khinjuk Stocks)The results of this study showed that GM significantly increased length of internode, fresh weight, and dry weight in both species.Although higher concentration of GM induced rate of growth,however growth malfOrmation was clearly evident in the seedlings. The effect of GM on seedling growth was noticed 15 to 30 days after treatment.
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