Fig. 1

The relationship between leaf anatomical traits, drought resistance (represented by MFVD), and elevation in dominant tree species. (A) Upper epidermis thickness (UET); (B) Upper epidermis cell length (UECL); (C) Upper epidermis cell width (UECW); (D) Lower epidermis thickness (LET); (E) Lower epidermis cell length (LECL); (F) Lower epidermis cell width (LECW); (G) palisade mesophyll thickness (PT); (H) Palisade cell length (PCL); (i) Palisade cell width (PCW); (J) spongy mesophyll thickness (ST); (K) Spongy cell length (SCL) ; (L) Spongy cell width (SCW) ; (M) Leaf thickness (LT) ; (N) Cuticle thickness (CT); (O) Membership function value for drought resistance (MFVD). Blue, black and red dots indicate species living in a depression, on a middle slope, and at a hilltop respectively. The red line indicates a significant positive correlation, the blue line indicates a significant negative correlation, and the black line indicates no correlation.