Table 3.
General Linear Mixed Models of the effects of light intensity (L), soil phosphorus (P), jasmonic acid treatment (J), and AMF (M), on leaf traits P. lanceolata plants and on growth and consumption parameters of M. brassicae caterpillars feeding on these plants.
| Source | Ndf | Caterpillar traits | Leaf traits | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| RGR | RCR | ECI | Leaf P | Leaf N | Aucubin | Catalpol | SLA | LDMC | |||
| F | F | F | F | F | F | F | F | F | |||
| L | 1 | 1.6 | 5.1* | 0.4 | 15.3** | 48.9*** | 8.0* | 7.2* | 100.7*** | 118.1*** | |
| P | 1 | 0.8 | 5.8* | 3.8+ | 22.4*** | 0.5 | 3.4+ | 6.3* | 22.4*** | 10.9** | |
| J | 1 | 4.6* | 8.1** | 0.3 | 1.3 | 0.3 | 0.0 | 0.1 | 3.4+ | 1.1 | |
| M | 1 | 0.1 | 0.5 | 0.7 | 66.8*** | 1.0 | 0.6 | 1.0 | 28.7*** | 16.8*** | |
| LxP | 1 | 1.6 | 2.6 | 0.0 | 1.1 | 4.3* | 0.0 | 1.0 | 8.3** | 2.8+ | |
| LxJ | 1 | 0.1 | 0.4 | 0.0 | 9.0** | 1.6 | 0.9 | 0.3 | 1.1 | 0.2 | |
| PxJ | 1 | 0.1 | 0.5 | 1.3 | 0.4 | 0.7 | 0.5 | 1.5 | 0.0 | 0.5 | |
| LxM | 1 | 0.0 | 1.0 | 1.2 | 0.0 | 0.7 | 0.3 | 0.0 | 0.8 | 0.0 | |
| PxM | 1 | 2.2 | 0.1 | 6.0* | 11.3** | 7.9** | 1.5 | 1.1 | 9.2** | 5.4* | |
| JxM | 1 | 0.1 | 0.0 | 0.2 | 1.7 | 0.2 | 0.0 | 0.2 | 0.3 | 1.7 | |
| LxPxJ | 1 | 0.0 | 0.3 | 0.3 | 1.6 | 0.0 | 0.4 | 0.2 | 3.1+ | 1.6 | |
| LxPxM | 1 | 0.2 | 0.3 | 0.1 | 0.3 | 0.9 | 0.0 | 0.3 | 3.1+ | 0.1 | |
| LxJxM | 1 | 0.8 | 0.3 | 0.1 | 6.3* | 2.2 | 0.5 | 0.3 | 2.7 | 0.0 | |
| PxJxM | 1 | 0.4 | 0.2 | 0.0 | 0.3 | 0.1 | 0.1 | 0.0 | 0.1 | 0.0 | |
| LxPxJxM | 1 | 1.1 | 0.0 | 1.0 | 1.0 | 0.3 | 0.0 | 0.2 | 6.8* | 2.3 | |
Data for bioassay 2 (10-week old plants). Values are F-values. Values in bold indicate significant effects (p < 0.05).
p < 0.10.
p < 0.05.
p < 0.01.
p < 0.001.
Ndf, numerator degrees of freedom. Denominator degrees of freedom (Dnf) are 11 for effects of light. Dnf for other factors are: 93 for RGR, RCR, and ECI, and 106 for the other traits. RGR, relative growth rate; RCR, relative consumption rate; ECI, efficiency of conversion of ingested food; leaf N, leaf nitrogen concentration; leaf P, leaf phosphorus concentration; SLA, specific leaf area; LDMC, leaf dry matter content (% dry weight).