[Objective] The effects of drought stress on the seed germination and seedling growth of Sibiraea angustata was investigated in order to provide reference for wild species domestication and population recovery.[Methods] To study the swellingrate

germination percentage

germination potential

germination index

vigor index

seed drought germination index and seedling growth in Sibiraea angustata under different concentrations of polyethylene glycol(PEG-6000) treatments.[Results] With the intensification of the stress level

the absorption process of the seeds of narrow leaves Sibiraea angustata showed three stages:rapid water absorption period

slow rising period and water absorption period

and the germination rate

germination potential

germination index

vigor index and seed drought-resistance germination index

seedling height and root length

and the seedling weight were negatively correlated with the stress intensity. When the polyethylene glycol concentration reached 30%

the germination of seed was inhibited completely. On the other hand

seed germination and emergence

and 50% of the time delay were decreased with the increase of stress intensity. Among them

the most stringent stage is emergence stage

seed emergence process of environmental was more sensitive

and drought capability is weak.[Conclusion] Drought stress significantly inhibited the seed germination and seedling growth

it also suggested that water is one of the dominant factor for the formation of seed germination and seedling growth. Therefore

planting Sibiraea angustata in the arid areas requires consideration of water supply.