Figure 1.

Induction of secondary dormancy in Cape Verde Island (Cvi) in response to cold stratification and decreasing water potential. Primary dormant Cvi seeds were incubated at 5 °C/dark on water or a range of water potentials from −0.4 to −1.2 MPa. At increasing periods of time, dormancy status was determined by measuring germination following transfer of seeds to (a) water or 10 mm KNO₃ or (b) a buffer control or 250 μ m GA_4 + 7 buffered at pH 5.0 at 20 °C/light for 28 d. Data are mean ± SE (n = 3). Absence of error bars indicates that SE is smaller than the symbol. GA, gibberellins.