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.