Probability values (P) of the ANCOVA analyses to test for differences in the Y-intercept and slope of the equations of the four Quercus species when each leaf stage was considered separately (n = 30 per species in each leaf stage). A significant interaction indicates differences in slope; only if the interaction is not significant can differences in the Y-intercept (species factor) be interpreted.
|Young leaves||< 0.0001||< 0.0001||0.0815|
|Fully expanded leaves||< 0.0001||< 0.0001||< 0.0001|
|Mature leaves||< 0.0001||< 0.0001||0.3706|