Table 1.
Volatile compounds detected in the headspace of mechanically damaged Brussels sprouts plants sprayed with Tween-20 (control), or with a 10 ml solution of 20 μg ml–1 alamethicin (ALA), 0.05 mM jasmonic acid (JA), or a mixture of 20 μg ml−1 ALA and 0.05 mM JA, all three solutions also containing Tween-20 (n=6 per treatment)
| Compound | Control | ALA | JA | ALA+JA | |
| Alcohols | |||||
| 1 | (Z)-3-Hexen-1-ol | 5.7±3.8 | 15.2±3.9 | 31.0±9.9 | 42.6±4.6 |
| 2 | 1-Hexanol | 8.7±0.7 | 11.7±1.7 | 11.1±2.0 | 12.9±1.4 |
| Aldehydes | |||||
| 3 | Hexanal* | 58.9±6.5 | 61.0±4.4 | 59.3±7.5 | 53.3±5.4 |
| Esters | |||||
| 4 | n-Butyl acetate | 22.0±2.5 | 22.1±3.9 | 21.3±4.6 | 18.7±2.2 |
| 5 | 2-Pentenyl acetate | 2.5±2.5 | 9.6±4.4 | 33.1±7.6 | 28.3±3.6 |
| 6 | (Z)-3-Hexen-1-yl acetate | 40.8±16.0 | 56.9±22.2 | 390.2±138.0 | 331.5±85.0 |
| 7 | Hexyl acetate | 1.9±1.9 | 7.0±1.9 | 22.1±4.4 | 25.2±4.6 |
| 8 | Methyl salicylate | 27.5±8.4 | 23.3±5.5 | 21.2±3.4 | 30.7±6.6 |
| Ketones | |||||
| 9 | 3-Pentanone | 16.0±2.3 | 22.8±2.4 | 34.7±11.0 | 42.6±7.5 |
| 10 | 3-Methyl-2-pentanone | 2.9±1.2 | 2.3±0.9 | 6.9±1.0 | 6.9±1.3 |
| 11 | 2-Hexanone | 14.8±2.3 | 10.8±1.1 | 11.0±1.9 | 9.0±2.2 |
| 12 | 3-Heptanone | 12.5±2.7 | 9.8±2.5 | 7.3±1.9 | 8.4±0.8 |
| 13 | 2-Heptanone | 6.1±1.1 | 3.5±0.7 | 5.0±1.1 | 4.2±0.3 |
| Terpenoids | |||||
| 14 | α-Thujene | 256.1±20.0 | 214.9±35.2 | 1390.5±1000.8 | 457.4±48.1 |
| 15 | α-Pinene | 52.0±2.4 | 50.9±4.0 | 81.8±8.6 | 78.5±6.2 |
| 16 | Thuja-2,4(10)-diene | 4.3±0.4 | 3.0±1.0 | 5.1±0.7 | 3.9±1.0 |
| 17 | Sabinene | 460.6±49.2 | 404.4±78.6 | 855.1±118.3 | 834.9±72.8 |
| 18 | β-Pinene | 72.3±9.9 | 59.9±9.1 | 97.7±10.9 | 100.7±6.8 |
| 19 | β-Myrcene | 107.7±18.0 | 99.2±25.7 | 179.0±39.4 | 215.5±32.9 |
| 20 | α-Phellandrene | 27.8±3.0 | 21.8±4.9 | 60.7±9.9 | 52.4±3.4 |
| 21 | 3-Carene | 9.3±0.6 | 8.6±0.8 | 9.9±2.0 | 9.7±0.8 |
| 22 | α-Terpinene | 320.7±203.2 | 91.7±15.7 | 206.5±48.7 | 227.5±15.4 |
| 23 | Limonene | 810.6±118.0 | 885.2±229.7 | 1369.5±267.4 | 1379.9±141.8 |
| 24 | 1,8-Cineole | 485.6±40.6 | 404.8±71.1 | 911.0±124.0 | 906.9±76.2 |
| 25 | γ-Terpinene | 114.0±11.2 | 93.3±20.2 | 237.1±38.3 | 226.3±16.8 |
| 26 | α-Terpinolene | 108.7±6.7 | 83.3±11.9 | 167.3±25.3 | 165.9±11.0 |
| 27 | p-Mentha-1,8-dien-6-ol, L-carveol | 22.8±1.3 | 22.9±2.4 | 29.7±3.6 | 29.1±1.4 |
| 28 | Alloocimene | 16.4±0.8 | 13.0±0.6 | 22.5±2.5 | 25.6±2.4 |
| 29 | (E)-4,8-Dimethylnona-1,3,7-triene† | 15.0±4.5 | 13.6±3.8 | 31.0±3.8 | 27.3±3.7 |
| 30 | D-Carvone | 9.0±1.6 | 10.1±2.6 | 16.7±3.4 | 14.6±2.2 |
| 31 | p-Cymen-ol | 4.5±1.9 | 4.7±1.5 | 10.1±1.7 | 9.0±1.0 |
| 32 | Thymol | 9.1±1.1 | 7.8±2.3 | 14.4±1.9 | 12.7±1.8 |
| 33 | Isolongifolene/aromadendrene | 14.9±1.2 | 14.6±1.8 | 14.3±3.3 | 13.4±1.2 |
| 34 | (E,E)-4,8,12-Trimethyltrideca-1,3,7,11-tetraene‡ | 14.2±5.5 | 19.9±5.2 | 12.8±3.9 | 31.4±9.1 |
| Total | 3248.9±313.0 | 2884.2±546.3 | 6473.8±159.8 | 5543.5±452.3 |
Mean ±SE of GC peak area (1000 units g FW).
*
Peak area estimated due to co-elution with octane.
†
DMNT.
‡
TMTT.