Germination time courses of J. curcas seeds at a range of water potentials,Ψ, as indicated, and incubated under different constant temperatures (20, 25 and 30 °C). The symbols are the actual data, and the lines are the time courses predicted by the hydrotime model using the values shown in Table 2 (A–C) or after correction of Ψb(50) (arrows showing the value after correction) and other hydrotime parameters (see Table 3) at 25 and 30 °C and at water potentials lower than 0 (E–F).