Figure 6
(A) Principal component analysis (PCA) of the physiological and anatomical parameters of Croton blanchetianus. In A, the large polymons represent the four clusters formed by the Euclidean distance method considering ~ 80% of similarity. (B) Loading plot of the physiological and anatomical parameters of Croton blanchetianus. In the loading plot the direction. length, and strength (thickness) of the lines are directly proportional to variables importance in separating groups. PC1, principal component 1; PC2, principal component 2. PN, net photosynthesis per unit mass; gs, stomatal conductance; SLA, specific leaf area; LA, leaf area; TLT, total leaf thickness; ADAE, adaxial epidermis thicknesses; ABAE, abaxial epidermis thicknesses; PMT, palisade mesophyll thickness, SMT, spongy mesophyll thickness; ASP, air spaces in palisade mesophyll; ASS, air spaces in spongy mesophyll; TM, thickness of the midrib; LM, length of the midrib; TMA, total midrib area; TX, thickness of xylem; TXA, total xylem area; AV, area of vessel; VNC, vessel number of cells; CT_Et, chloroplast thickness; CL_C, chloroplast length; TC_Ac, total chloroplast area; TS_Vt, total starch area; NS_Ac, number of starch grains.
