Effects of storage temperature at 4°C (■), -18°C (▴), and -80°C (●) on normal germination in S. xerophila Flod. Seeds were stored for up 60 months with water contents controlled to 3% (A), 6% (B), 9% (C), 12% (D), 18% (E), or 24% (F) (fresh weight basis). Storage temperature (ST)***, seed water content (SWC)***, storage period (SP)***, ST × SWC***, ST × SP***, SWC × SPns, ST × SWC × SP**. All values are means of four replicates ± SD (n=4). ** and *** indicate significant difference at p < 0.01 and p < 0.001, respectively, and ns indicates non-significance.