Table 2.
Volatile organic compounds (VOCs) detected in six different cultivars of growth stage 1.1–1.2 oilseed rape (Brassica napus) seedlings by GC-MS
| VOC | OSR cultivar |
|||||
|---|---|---|---|---|---|---|
| ‘Agatha’ | ‘Astrid’ | ‘Avatar’ | ‘Cracker’ | ‘Cubic’ | ‘Thorin’ | |
| Acetone | 8·00 ± 8·00 | n.d. | 1·90 ± 1·75 | 3·81 ± 3·43 | n.d. | 0·11 ± 0·11 |
| Ucomp F | 1·24 ± 1·24 | n.d. | 0·19 ± 0·19 | n.d. | n.d. | 1·48 ± 1·31 |
| α-Pinene** | 8·13 ± 1·23 | 1·82 ± 0·89 | 4·95 ± 0·39 | 8·12 ± 2·54 | 13·75 ± 3·09 | 5·64 ± 0·92 |
| α-Phellanderene | 15·17 ± 4·04 | 4·66 ± 2·09 | 19·55 ± 4·20 | 15·64 ± 6·68 | 15·10 ± 6·48 | 16·71 ± 2·28 |
| Ucomp G | n.d. | n.d. | 0·38 ± 0·24 | n.d. | n.d. | 0·40 ± 0·23 |
| Umono C | 1·43 ± 0·85 | n.d. | 3·22 ± 1·09 | 2·33 ± 1·34 | 1·12 ± 1·12 | 2·17 ± 0·80 |
| β-Myrcene | 0·77 ± 0·77 | n.d. | 1·36 ± 1·10 | 6·63 ± 5·79 | 2·39 ± 1·85 | 1·41 ± 0·59 |
| δ-3-Carene** | 22·71 ± 3·94 | 4·10 ± 2·21 | 18·41 ± 2·36 | 16·10 ± 3·84 | 20·49 ± 3·00 | 18·32 ± 3·47 |
| α-Terpinene*** | n.d. | n.d. | 2·18 ± 0·46 | n.d. | n.d. | 1·38 ± 0·80 |
| d-Limonene* | 23·97 ± 4·29 | 6·04 ± 2·53 | 31·75 ± 4·02 | 19·47 ± 8·86 | 20·66 ± 5·67 | 25·14 ± 3·87 |
| Eucalyptol | n.d. | n.d. | 0·74 ± 0·43 | n.d. | n.d. | 0·25 ± 0·14 |
| Ucomp C* | n.d. | n.d. | n.d. | n.d. | n.d. | 0·20 ± 0·12 |
| γ-Terpinene | 1·91 ± 1·14 | 0·51 ± 0·51 | 5·66 ± 1·14 | 2·14 ± 1·29 | 1·41 ± 0·87 | 4·66 ± 1·88 |
| Octadiene | 1·85 ± 1·85 | 1·70 ± 1·14 | 0·44 ± 0·31 | 0·31 ± 0·31 | 1·69 ± 1·32 | 3·27 ± 1·72 |
| ρ-Cymene | 0·72 ± 0·72 | 0·51 ± 0·51 | 1·34 ± 0·48 | n.d. | 0·37 ± 0·37 | 1·72 ± 0·65 |
| Umono A | n.d. | n.d. | 0·43 ± 0·25 | n.d. | n.d. | 0·51 ± 0·30 |
| Umono B | n.d. | n.d. | 0·25 ± 0·25 | 1·98 ± 1·22 | 0·25 ± 0·25 | 0·19 ± 0·19 |
| 3-Hexen-1-ol acetate*** | 1·09 ± 1·09 | 75·27 ± 8·65 | 4·98 ± 4·83 | 17·51 ± 8·37 | 10·45 ± 6·56 | 7·35 ± 3·71 |
| Anisole | 0·45 ± 0·45 | n.d. | 0·36 ± 0·36 | n.d. | n.d. | 0·25 ± 0·15 |
| 3-Hexen-1-ol | n.d. | 0·65 ± 0·40 | 0·12 ± 0·12 | n.d. | n.d. | n.d. |
| Ucomp E | 5·86 ± 4·77 | 2·70 ± 2·70 | 0·71 ± 0·46 | 2·08 ± 0·79 | 3·68 ± 3·22 | 5·60 ± 3·78 |
| Ucomp A | 2·44 ± 2·44 | 1·04 ± 1·04 | 0·16 ± 0·16 | 1·51 ± 0·92 | 1·07 ± 1·07 | 1·68 ± 1·39 |
| Ucomp D | 1·55 ± 1·55 | 0·55 ± 0·55 | 0·55 ± 0·42 | 0·68 ± 0·68 | 2·54 ± 0·88 | 0·78 ± 0·28 |
| Ucomp B* | 2·71 ± 1·06 | 0·47 ± 0·47 | 0·36 ± 0·23 | 1·70 ± 0·61 | 5·03 ± 1·53 | 0·79 ± 0·58 |
Asterisks next to names indicate whether proportions were significantly different across cultivars (*P < 0·05; **P < 0·01; ***P < 0·001); figures indicate the percentage of that cultivar’s total made up by that VOC, ±1 s.e.; n.d. = not detected. Ucomp A–G indicate unknown compound; Umono A–C indicate unknown monoterpenes.