In Vivo Propagation of Akub (Gundelia tournefortii L.) by Seeds

Two experiments, one in the laboratory and one in the greenhouse, were conducted to study the propagation of of Gundelia tournefortii by seeds. In the lab experiment, different concentrations of GA3 (0.0, 100, 300 and 500 ppm), KNO3 (0.1, 0.2 and 0.3% (w/v)) and thiourea at (1, 2 and 3% (w/v)) were studied to break seed dormancy of Gundelia tournefortii. In the greenhouse experiment, the effects of different concentrations of GA3 (0.0, 250, 500 and 750 ppm) and different soaking durations (6, 12, 24 and 48 hours) on seed germination of Gundelia tournefortii were investigated .Using 100 and 300 ppm GA3 gave the highest germination percentage (50% and 63%, resectively) in the lab experiment, whereas the 500 ppm GA3 concentration reduced seed germination. In the greenhouse experiment, soaking the seeds in 250 ppm GA3 for 6 hours resulted in the highest germination percentage (83 %)