Document Type : Original Article
Abstract
In order to study of acid gibberellic pretreatments on the enhancement of aged seed germination and seedling growth of Tanacetum parthenium in laboratory condition, a factorial experiment based on completely randomized design with three replications was conducted in seed technology laboratory in research institute of forests and rangeland, Tehran, Iran in 2015. The factors A were: conservation in basic cold room (-18◦C), active cold room (+4◦C), regenerated seeds and aged seeds (48 h) and factor B were: osmopriming (PEG 0.3 and 0.6Mpa), hormon priming (500 and 1000 ppm of Acid Gibberlic), hydropriming (distilled water) and control. The usual germination characteristics were measured. Higher germination percentage and speed of germination and seedling length were obtained from regenerated seed which conserved at( 24Cº). The more germination characteristics were observed on the seeds which conserved in active room with duration of 10 to 20 years. The minimum germination characteristics were in aged seeds by artificial conditions. Highest germination characteristics were with Gibberlic Acid ( 1000 ppm) . Maximum some of germination traits were observed with osmopriming technique (Poly ethylene glycol 0.6 Mpa). The highest germination traits were obtained with Gibberlic Acid of (1000 ppm ) and Poly ethylene glycol of (0.6 Mpa), in active cold room. In base cold room seed reservoir, effect of osmopriming ((Poly ethylene glycol 0.6 Mpa) were more than other treatments while in aged seeds of artificial conditions, osmoprimin (Poly ethylene glycol 0.6, 0.3 Mpa) have more effect on aged seeds retrieval compare with other treatments
Keywords
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