3.2 Difference in structure-function relationships between roots
and branches
t 2/b 2 and
|P 50| were positively
correlated both in branches (r 2 = 0.50,P < 0.001; Figure 2a) and in roots
(r 2 = 0.60, P < 0.001; Figure
2b). By contrast, there were significantly negative correlations betweenD h and
|P 50| both in branches
(r 2 = 0.50, P < 0.001; Figure
2c) and in roots (r 2 = 0.31, P< 0.001; Figure 2d), whereas the regression coefficient of
root and branch traits had no significant differences (P =
0.424).