Table 2.
Regression analyses of all data presented in Figs. 2–4 together with the percentage variance accounted for by the regression (R2), the level of probability (P) for each regression
| Regression (y = bx + a) | R2 | P | n | |
|---|---|---|---|---|
| All measurements | y = 1·09x + 5·39 | 54·2 | *** | 110 |
| Monocots | y = 1·29x + 2·44 | 58·7 | *** | 48 |
| Eudicots | y = 0·32x + 10·2 | 15·4 | *** | 62 |
| Diploids | y = 1·04x + 4·95 | 49·86 | *** | 86 |
| Polyploids | y = 1·14x + 3·12 | 56·3 | *** | 24 |
| Annuals | y = 0·20x + 10·7 | 19·9 | *** | 75 |
| Perennials | y = 1·37x + 4·13 | 63·6 | *** | 35 |
*** P < 0·001; n, number of replicates.