The experiment was conducted in the

The experiment was conducted in the Plant Physiology Laboratory of Faculty of Horticulture and Forestry at Banat University of Agricultural Sciences and Veterinary Medicine of Timisoara, Romania. The germination experiments were carried out in January 2012. The seeds were incubated at laboratory conditions at 25°C and were monitored until the end of the germination period of 7 days. Seeds of the three sorghum cultivars namely, cv. “F135ST”, cv. „Sugargraze I” and „Sugargraze II”. Seeds were surface sterilized with NaOCl 5% for 7 minutes, then rinsed three times with sterilized distilled water. To hurry the germination, after sterilization the seeds were stored in sterilized distilled water for six hours at normal light and room temperature. The seeds were germinated in covered, sterilized, disposable Petri dishes lined with filter paper and moistened with distilled water (control), or polyethylene glycol (PEG6000) solution (from 0 to-0,3 and -0,6 MPa). Three replicates of 100 seeds were used for each treatment and cultivar. Every second day, 5 ml of the respective treatments were applied to each Petri dish and to maintain adequate moisture. This experiment was arranged in a Completely Randomized Design (CRD). There were 3 replicates per treatment. Every day biometrical measurements were estimated, namely daily germination, radicle and shoot lengths were measured during 7 days after initial germination. Four parameters, namely germination percentage, germination rate, germination index, coefficient of velocity of germination were estimated