Table 1.
Differences among populations of Ageratina adenophora originating from invasive (China and India) and native (Mexico) ranges
| Variable | Population origin |
F | ||
|---|---|---|---|---|
| Mexico | China | India | ||
| NP/NL, g·g−1 | 0.57 ± 0.029b | 0.63 ± 0.016a | 0.65 ± 0.021a | 3.58* |
| Pmax, μmol·m−2·s−1 | 12.72 ± 0.769c | 14.91 ± 0.51b | 16.63 ± 0.74a | 8.74*** |
| PNUE, μmol·g−1·s−1 | 10.39 ± 0.71b | 12.05 ± 0.47a | 13.01 ± 0.55a | 5.04** |
| NL, g·m−2 | 1.25 ± 0.04 | 1.26 ± 0.04 | 1.31 ± 0.05 | 0.58 |
| PCW, g·m−2 | 0.69 ± 0.045a | 0.23 ± 0.035b | 0.54 ± 0.083b | 16.75*** |
| PCW/PL, g·g−1 | 0.124 ± 0.010a | 0.065 ± 0.008b | 0.089 ± 0.008b | 10.80** |
| NCW/NL, g·g−1 | 0.093 ± 0.006a | 0.035 ± 0.007c | 0.064 ± 0.008b | 18.56*** |
| LMA, g·m−2 | 61.54 ± 2.11a | 50.85 ± 1.11b | 53.32 ± 1.34b | 13.27*** |
| Plant height, cm | 69.48 ± 1.03b | 79.18 ± 1.17a | 81.10 ± 1.29a | 30.851*** |
| Stem diameter, mm | 5.75 ± 0.12b | 6.45 ± 0.12a | 6.09 ± .016ab | 6.26** |
| Leaf density, kg·m−3 | 36.55 ± 0.78a | 25.68 ± 0.85c | 31.08 ± 1.00b | 40.98*** |
| Leaf length, cm | 6.18 ± 0.16c | 8.00 ± 0.10a | 6.85 ± 0.14b | 40.302*** |
| Leaf width, cm | 3.95 ± 0.10c | 5.07 ± 0.10a | 4.28 ± 0.09b | 36.002*** |
| Leaf area, cm2 | 12.92 ± 0.55c | 20.29 ± 0.60a | 15.08 ± 0.53b | 45.302*** |
Country mean value ± SE is given [five populations per country and five (10 for height and diameter) individuals per population]. Different letters in the same row indicate significant differences among countries (one-way ANOVA, Duncan test).
*, P ≤ 0.05;
**, P ≤ 0.01;
***, P ≤ 0.001.
NP/NL, the proportion of leaf nitrogen allocated to the photosynthetic machinery; Pmax, light-saturated photosynthetic rate; PNUE, photosynthetic nitrogen use efficiency; NL, leaf nitrogen content; PCW, cell wall protein content; PCW/PL, the ratio of cell wall proteins to total leaf proteins; NCW/NL, the proportion of leaf nitrogen allocated to cell walls; LMA, leaf mass per area.