Table 2.
Results of two Generalized Linear Models analyzing the effects of plant age, maternal herbivory, progeny herbivory (herbivory), and the interactions on the expression of antiherbivore defenses (glucosinolate concentration and trichome density) in wild radish
| Response variable | Hypothesis tested | F value | df | P value |
| Physical defenses (Trichome density) | Inducibility | |||
| Age | 23.761 | 1;147 | <0.001 | |
| Herbivory | 4.741 | 1;147 | 0.031 | |
| Age × herbivory | 0.442 | 1;147 | 0.507 | |
| Transgenerational induction | ||||
| Maternal herbivory | 34.774 | 1;147 | <0.001 | |
| Age × maternal herbivory | 0.469 | 1;147 | 0.495 | |
| Transgenerational priming | ||||
| Herbivory × maternal herbivory | 4.409 | 1;147 | 0.037 | |
| Herbivory × maternal herbivory × age | 3.706 | 1;147 | 0.056 | |
| Chemical defenses (Glucosinolate concentration) | Inducibility | |||
| Age | 19.737 | 1;149 | <0.001 | |
| Herbivory | 32.429 | 1;149 | <0.001 | |
| Age × herbivory | 3.107 | 1;149 | 0.079 | |
| Transgenerational induction | ||||
| Maternal herbivory | 3.175 | 1;149 | 0.077 | |
| Age × maternal herbivory | 2.159 | 1;149 | 0.145 | |
| Transgenerational priming | ||||
| Herbivory × maternal herbivory | 0.695 | 1;149 | 0.040 | |
| Herbivory × maternal herbivory × age | 0.084 | 1;149 | 0.775 |
Significant (<0.05) and marginally significant (<0.10) P values are given in bold. df, degrees of freedom.