Effect of different treatments on breaking dormancy of Teucrium polium

Abstract

In order to evaluate effects of different treatments on breaking dormancy of Teucrium polium, an experiment was conducted with 3 replications in a completely randomized design. Seeds were subjected to different treatments including various levels of GA3, H2SO4, soaking with water and chilling. Germination of Teucrium polium increased with different concentrations of GA3. Percentage germination Maximum and rate was obtained at concentrations of 250, 1500 ppm (72h) GA3 and combination of GA3 (1500ppm) and chilling (5 ºC) for a period of 14 days. GA3 (500ppm) increased germination percentage but not germination rate. Soaking with water broke dormancy and induced 32% seed germination of Teucrium polium, but H2SO4, freezing (-10 ºC) and combination of both treatments had no effect on dormancy.