Figure 2

The temperature at the onset date of phenophase (Tp) and temperature sensitivity (Tsen) for first leaf date of Sophora japonica plotted according to latitude.
The overall dependence of Tp and Tsen on latitude is high: for Tp: R2 = 0.93, y = −59.98 + 4.922*x − 0.1059x2 + 7.452*10−4x3, n = 41, P < 0.001; for Tsen: R2 = 0.94, y = −38.37 + 2.450*x − 0.059x2 + 4.204*10−4x3, n = 41, P < 0.001.