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. 2012 Jul 24;7(7):e41502. doi: 10.1371/journal.pone.0041502

Figure 7. Allometric plots for plant traits.

Figure 7

Data for individual slopes and intercepts are given in Table 1. The SMA regression (using SMATR package of R) was used to test the slope and intercept heterogeneity at α = 0.05 (where slopes or intercepts non-heterogeneous, P>0.05) between the two soil textures: (A) Leaf mass versus plant size. Slopes non-heterogeneous, P = 0.32; Intercepts heterogeneous: leaf mass was higher at a given plant size in clay soil treatment (P<0.001); (B) Root mass versus plant size. Slopes non-heterogeneous, P = 0.056; Intercepts heterogeneous: root mass was lower at a given plant size in clay soil treatment (P<0.001); (C) Stem mass versus plant size. Slopes non-heterogeneous, P = 0.05; Intercepts non-heterogeneous: stem mass was equal at a given plant size between clay and sandy soil treatment (P = 0.49); (D) Leaf area versus plant size. Slopes non-heterogeneous, P = 0.055; Intercepts heterogeneous: leaf area was higher at a given plant size in clay soil treatment (P<0.001); (E) Root length versus plant size. Slopes non-heterogeneous, P = 0.054; Intercepts heterogeneous: root length was lower at a given plant size in clay soil treatment (P<0.001); and (F) Diameter of basal stem versus plant height. Slopes non-heterogeneous, P = 0.08; Intercepts non-heterogeneous: diameter of basal stem was equal at a given plant height between clay and sandy soil treatment (P = 0.08).