Fig. 4

Quantitative analysis of the widths of regions of tension wood in the upper portions of stem of inclined seedlings of F. moluccana, A. heterophyllus and D. celebica, three months after the start of inclination. The widths differed significantly among species (P < 0.001). Error bars indicate standard errors (n = 5 seedlings per species). Different letters above bars indicate significant differences, as determined by Tukey’s post hoc test at P < 0.05