Table 2.
Effects of methyl jasmonate (MeJA) on inducible plant defense response of untreated neighboring bilberry ramets at different distances over three consecutive years
| dist. 1 | dist. 2 | dist. 3 | dist. 4 | |||||
|---|---|---|---|---|---|---|---|---|
| Interc. | Slope | Interc. | Slope | Interc. | Slope | Interc. | Slope | |
| 2013 | ||||||||
| Insect grazed leaves | −0.29 | −0.28 | 0.66 | −0.55(*) | 0.32 | −0.51(*) | 0.84 | −0.60* |
| Browsed shoots | −0.70* | 0.09 | −0.76* | 0.14 | −0.52 | −0.03 | −0.64(*) | 0.12 |
| Dry mass | −0.84** | −0.05 | −0.74** | 0.06 | −0.73* | −0.04 | −0.51* | −0.03 |
| Flowers | −1.22(*) | NA | −1.25(*) | NA | −1.60* | NA | −0.20 | NA |
| Berries | −0.82(*) | NA | −1.11* | NA | −1.11* | NA | 0.07 | NA |
| 2014 | ||||||||
| Insect grazed leaves | −1.04* | −0.17 | −1.44** | −0.18 | −1.35** | −0.17 | −0.46 | −0.11 |
| Browsed shoots | −1.22* | −0.12 | −0.08 | −0.49** | −0.70 | −0.37(*) | −0.76 | −0.16 |
| Dry mass | −1.03*** | −0.01 | −0.68* | −0.12 | −0.63* | −0.03 | −0.40 | −0.03 |
| Flowers | −0.32 | NA | −0.35 | NA | −0.06 | NA | −0.40 | NA |
| Berries | −0.45** | NA | −0.17 | NA | −0.09 | NA | −0.14 | NA |
| 2015 | ||||||||
| Insect grazed leaves | −1.55** | 0.48 | 0.81 | 0.03 | −1.64* | 0.05 | −0.71 | −0.04 |
| Browsed shoots | −2.18*** | 0.27 | −1.50* | 0.43(*) | −0.92 | −0.09 | −1.88* | 0.27 |
| Dry mass | −0.90** | −0.21 | −0.62* | −0.07 | −0.34 | −0.38 | −0.08 | −0.34 |
| Flowers | −0.54 | NA | −0.24 | NA | −0.84* | NA | −0.11 | NA |
| Berries | −0.40 | NA | −0.28 | NA | −0.60(*) | NA | −0.08 | NA |
This table shows the effect of MeJA on intercepts (mean) and time slopes for untreated neighbor ramets at different distances (experimental transect) in relation to the control at dist. 0 (control transect) over three consecutive years. Effects on intercept reflect general differences on average in each year. Effects on slope reflect differences in the temporal development during the respective season. Positive numbers mean that neighbor ramets at respective distance had higher values for the respective variable or had higher time slope than the controls. Negative numbers mean that neighbor ramets at respective distance had lower values for the respective variable or had lower time slope than the controls. For reproduction variables (flowers and berries), seasonal slopes are not applicable (NA) as they are measured once per season, and only annual means per treatment (intercept effect) are reported.
Significance is indicated by: ***<0.001, **<0.01, *<0.05, (*) <0.1.