Table 1.
Emission rate of the six major volatiles and content of the iridoid glycosides in the leaves of herbivory-treated, mechanically wounded and untreated control Plantago lanceolata plants
| Compound | Mycorrhizal | Non-mycorrhizal | ||||
|---|---|---|---|---|---|---|
| Herbivory | Mechanical wounding | Control | Herbivory | Mechanical wounding | Control | |
| Volatiles | ||||||
| ng (gDW)−1 hr−1; mean ± SE | ||||||
| (Z)-3-hexenyl acetate | 376.61 ± 97.56 | 552.15 ± 65.96 | 364.37 ± 99.6 | 581.96 ± 104.68 | 376.61 ± 71.3 | 97.19 ± 13.59 |
| (E)-β-ocimene | 75.37 ± 15.19 | 6.94 ± 2.21 | 1.01 ± 0.71 | 103.04 ± 17.41 | 4.06 ± 1.10 | 0.94 ± 0.60 |
| DMNT | 22.05 ± 4.64 | 0.19 ± 0.19 | 0.00 | 68.65 ± 11.71 | 0.70 ± 0.52 | 0.00 |
| (E)-β-caryophyllene | 45.90 ± 10.06 | 2.23 ± 0.92 | 0.00 | 107.69 ± 25.83 | 0.23 ± 0.19 | 0.65a |
| (E)-α-bergamotene | 25.84 ± 5.03 | 1.13 ± 0.81 | 0.00 | 70.16 ± 12.64 | 0.45a | 0.45a |
| (E)-β-farnesene | 31.84 ± 8.05 | 0.88 ± 0.61 | 0.00 | 101.75 ± 21.67 | 0.00 | 0.59a |
| Iridoid glycosides | ||||||
| µg (mgDW)−1; mean ± SE | ||||||
| Catalpol | 2.79 ± 0.32 | 2.87 ± 0.35 | 3.26 ± 0.34 | 3.03 ± 0.32 | 2.95 ± 0.33 | 2.94 ± 0.47 |
| Aucubin | 7.13 ± 0.58 | 6.61 ± 0.54 | 6.89 ± 0.49 | 7.35 ± 0.51 | 6.54 ± 0.60 | 5.37 ± 0.54 |
aThese volatiles were emitted by a single plant, therefore the SE has not been calculated