Effects of Different Treatments to Stimulate Seed Germination of Salsola arbusculiformis Drob

Germination is a critical stage in the life cycle of plants and often controls population dynamics, with major practical implications. Salsola arbusculiformis is one of the most important plants used to prevent soil erosion and a good fodder resource for sheep and goat in the rangelands of Iran. However, the species seems to have low seed germination, so the purpose of this study was to investigate the effects of different treatments to improve its seed germination. Three concentrations of gibberellic acid (۱۰۰, ۵۰۰ and ۱۰۰۰ ppm), mechanical scarification with sandpaper, concentrated sulphuric acid (H۲SO۴ (۹۸%)), potassium nitrate (KNO۳ (۰.۲%)), thiourea one Molar, four prechilling periods (۱۰, ۲۰, ۳۰ and ۱۵۰ days at ۲ °C) were used as study treatments and distilled water as control. The results showed that there were significant differences (p<۰.۰۵) among and within the treatments in their effects on seed germination. The effective treatments to stimulate seed germination were prechilling for ۱۵۰ and ۳۰ days; sulphuric acid and sandpaper scarification. Prechilling for ۱۵۰ and ۳۰ days increased germination by ۸۸.۴% and ۸۵.۶۵%, respectively, while sulphuric acid and sandpaper scarification both increased germination by ۷۶.۱% compared to the control. The results also showed that gibberellic acid, potassium nitrate and thiourea did not promote seed germination. It was inferred that the most effective treatments among the methods used for breaking seed dormancy of Salsola arbusculiformis were prechilling for ۱۵۰ days and mechanical scarification by hand with sandpaper.

کلیدواژه ها:

Pre-Germination treatment ، Rangeland plants ، Scarification ، Seed dormancy ، Stratification