Figure 1. Germination percentage of E. songoricum seeds under different PEG treatment. The E. songoricum seeds with different PEG treatment were placed in a germinator at 25 °C/10 °C with a 12 h light/dark cycle and a relative humidity of 60 % for seven days. The un-germinated seeds were transferred to distilled water to calculate the recovery percentage. Different lowercase letters indicate significant differences in germination percentage and capital letters indicate significant differences in recovery percentage (P < 0.05).