بررسي اثر ژيبرليك اسيد و سيتريك اسيد بر درصد، سرعت جوانه زني و شاخص بنيه بذرهاي سريش تماشايي EREMURUS SPECTABILIS M.B( )

Effects of gibberellic and citric acid on germination percentage, speed of germination and seed vigor of Eremurus spectabilis M.B.

In order to study seed germination characterisitics of Eremurus spectabilis under physical and chemical treatments, the mature seeds of Eremurus spectabilis were treated by collected from National Botanical Garden of Iran. Seeds were imposed under physical stimulator pretreatments, including soaking of seeds in water for 24-48h, cutting of seedsʹ tip, making abrasion on seed cortex, exposing to light for 24h, 12h and incubating in darkness. It was also followed by chemically stimulation the seeds, using sodium hypochloride, citric acid and gibberellic acid in different constrations, in order to achieve suitable methods of germination and breaking dormancy. Soaking of seeds in the water for 24-48h, removing seed cortex and washing in 35% sodium hypocholoride and distilled water, cutting seed tip and treat in gibberrelic acid (0.01 M.) and citric acid (50 mg/lit) for 45 minutes and temperature 10-15°C and white light, 24h (4500-5000 lux) for 1-3 weeks led to the highest germination percentage (53.3%), germination speed (0.88) and seed vigor (10.2).