Interplay between drought tolerance, functional traits and climatic origin
P50 and HV were significantly correlated with species climate-origin. Drought tolerance (stem P50) was significantly related with rainfall (MAP R2 = 0.51, P-value = 0.001) and aridity (AI R2 = 0.49, P-value = 0.001), but unrelated with temperature (MAT R2 = 0.13, P-value = 0.143) (Fig 3 a, b, c). Variation in stem P50was not significantly related to any functional traits; WD, SLA, leaf area and HV (Fig S4, supporting information). Similar to stem P50, HV was significantly related to MAP (R2 = 0.24, P = 0.04), AI (R2 = 0.22, P = 0.04) but unrelated with MAT (R2 = 0.156, P = 0.111) (Fig 3 d, e, f). Wood density, SLA and leaf size were not found to be significantly related to any of the climate variables.