Seed Dormancy Breaking of Ziziphus Nummularia

In this experiment, scarification of seed endocarp with sandpaper, treatment with sulphuric acid (95%) for periods of 10, 20, 30, 40, 50 and 60 minutes and immersion in boiling water for 10 minutes were applied in order to break the seed dormancy of Ziziphus nummularia. The seed germination of Z. nummularia is not easy because of hard seed coat. The results showed that the high percentage of germination belongs to the treatment of scarification with sandpaper (65%) and the treatment of sulphuric acid for 10 min (46%). The seeds germination in distillated water as control and boiling water for 10 min were 0 and 5%, respectively. It can be concluded that the dormancy of these seeds is physical kind which inhibits seed imbibition and or gas exchange and the best seed dormancy breaking method is scarification of seed coat with sandpaper.