Effects of seed size and bract of on germination and seedling growth under drought stress.

Drought is a crucial factor affecting seed germination and seedling growth of desert plants. In the study, we examined the effects of seed size (large, small) and bract (without bracts, with bracts) on seed germination and seedling growth of , a perennial super xerophyte semi-shrub, under different drought levels (0, 100, 200, 300 and 400 g·L PEG6000). The results showed that drought stress significantly inhibited seed germination and reduced shoot length of seedlings.