Table 1.
Percentage (mean ± SD) of each compound as part of the headspace of Ericainfundibuliformis. Compounds are grouped by major compound class (cf. Knudsen and Tollsten 1993) and sorted within class according to the Kovats Retention Index (KRI). CAS number is provided for compounds that could be identified. In case a compound could be identified without information of which the particular stereoisomer was present, no CAS number is provided. Compound names in cells with light grey shading were also found in E.cylindrica. Sample sizes of percentages are only given in case a compound was not found in all samples within a particular batch. Mass spectra of compounds for which the KRI is marked with an asterisk are provided in Suppl. material 1.
| Compound name | KRI | CAS number | Stetteynsberg day (n = 3) | Stetteynsberg evening (n = 3) | Agtertafelberg evening (n = 4) |
|---|---|---|---|---|---|
| Aliphatics | |||||
| Aliphaticalcohols | |||||
| (E)-Hex-3-en-1-ol | 1364 | 928-97-2 | 1.57 ± 2.50 | 0.02 ± 0.02 (2) | 1.46 ± 0.63 |
| Oct-1-en-3-ol | 1426 | 3391-86-4 | 0.02 ± 0.02 | 0.02 ± 0.02 (2) | 0.67 ± 0.30 |
| 4-Hexen-3-ol | 1754 | 4798-58-7 | 0.03 ± 0.02 (2) | 0.04 ± 0.03 (2) | 0.18 ± 0.13 |
| Aliphaticaldehydes | |||||
| (E)-Hex-2-enal | 1213 | 6728-26-3 | 0.09 ± 0.10 | ||
| (E)-4-Oxohex-2-enal | 1568 | 20697-55-6 | 0.51 ± 0.83 | 0.65 ± 0.50 | |
| Aliphaticalkanes | |||||
| Tetradecane | 1400 | 629-59-4 | 0.06 ± 0.13 (1) | ||
| Pentadecane | 1500 | 629-62-9 | 0.12 ± 0.24 (1) | ||
| Hexadecane | 1600 | 544-76-3 | 0.14 ± 0.29 (1) | ||
| Heptadecane | 1700 | 629-78-7 | 0.05 ± 0.11 (1) | ||
| Octadecane | 1800 | 593-45-3 | 0.03 ± 0.05 (2) | ||
| Aliphaticesters | |||||
| (E)-Hex-4-en-1-yl acetate | 1302 | 72237-36-6 | 1.05 ± 0.77 | 0.95 ± 0.69 | |
| (E)-3-Hexen-1-yl butyrate | 1445 | 53398-84-8 | 0.40 ± 0.58 | 0.39 ± 0.23 | |
| (Z)-3-hexenyl 2-methylbutyrate | 1460 | 53398-85-9 | 0.03 ± 0.04 | 0.03 ± 0.01 | |
| (Z)-3-Hexenyl hexanoate | 1638 | 31501-11-8 | 0.03 ± 0.02 | ||
| Benzenoids | |||||
| Benzaldehyde | 1503 | 100-52-7 | 0.11 ± 0.04 | 3.20 ± 5.47 | 0.18 ± 0.09 |
| Phenylethyl alcohol | 1881 | 60-12-8 | 0.02 ± 0.00 | 0.19 ± 0.31 | 0.03 ± 0.01 |
| Isoprenoids | |||||
| Irregularterpene | |||||
| 6-Methyl-5-hepten-2-one | 1322 | 110-93-0 | 0.10 ± 0.05 | 0.04 ± 0.07 (1) | 0.96 ± 0.67 |
| Monoterpenes | |||||
| β-Myrcene | 1163 | 123-35-3 | 1.13 ± 0.44 | 0.65 ± 0.57 (2) | 0.95 ± 0.36 |
| (Z)-Ocimene | 1231 | 3338-55-4 | 5.36 ± 1.59 | 1.20 ± 1.05 (2) | 3.79 ± 0.40 |
| (E)-Ocimene | 1251 | 3779-61-1 | 80.0 ± 5.02 | 89.1 ± 3.15 | 82.9 ± 2.06 |
| 2,6-Dimethylocta-2,4,6-triene stereoisomer 1 | 1367 | 0.39 ± 0.40 | 0.15 ± 0.07 | ||
| 2,6-Dimethylocta-2,4,6-triene stereoisomer 2 | 1384 | 0.47 ± 0.81 (1) | |||
| 2,6-Dimethyl-1,3,5,7-octatetraene stereoisomer 1 | 1423 | 0.05 ± 0.06 | 0.09 ± 0.10 (2) | 0.28 ± 0.18 | |
| 2,6-Dimethyl-1,3,5,7-octatetraene stereoisomer 2 | 1435 | 0.35 ± 0.28 | 0.34 ± 0.38 (2) | 1.58 ± 0.48 | |
| (Z)-Furan linalool oxide stereoisomer | 1453 | 0.03 ± 0.01 | 0.01 ± 0.02 (1) | ||
| Myroxide stereoisomer | 1469 | 0.06 ± 0.05 (2) | 0.04 ± 0.03 (2) | 0.10 ± 0.04 | |
| Linalool | 1520 | 78-70-6 | 6.49 ± 5.66 | 4.01 ± 2.81 | |
| Cinerone stereoisomer | 1542* | 0.04 ± 0.03 (2) | tr (1) | 0.12 ± 0.09 | |
| Pinocarvone | 1561 | 30460-92-5 | 0.03 ± 0.03 (2) | 0.07 ± 0.10 (2) | |
| α-Terpineol | 1672 | 98-55-5 | 0.02 ± 0.01 | ||
| Pinocarveol | 1685 | 5947-36-4 | 0.06 ± 0.01 | 0.01 ± 0.01 (1) | 0.07 ± 0.04 |
| p-Mentha-1,5-dien-8-ol | 1695 | 1686-20-0 | tr (2) | 0.01 ± 0.01 (2) | 0.02 ± 0.02 (3) |
| 2,6-dimethylocta-3,5,7-trien-2-ol stereoisomer 1 | 1770 | tr (2) | 0.03 ± 0.02 (2) | 0.08 ± 0.07 (3) | |
| 2,6-dimethylocta-3,5,7-trien-2-ol stereoisomer 2 | 1787 | 0.11 ± 0.10 (2) | 0.22 ± 0.19 (2) | 0.59 ± 0.28 | |
| 2,6-Dimethyl-3,7-octadiene-2,6-diol | 1900* | 13741-21-4 | 0.02 ± 0.01 (2) | ||
| Miscellaneous compounds | |||||
| 3-Methyl-2-(2-methyl-2-butenyl)-furan | 1389 | 15186-51-3 | 0.10 ± 0.06 | 0.03 ± 0.03 (2) | 0.11 ± 0.04 |
| 5,5-dimethyl-2(rH)-furanone | 1583 | 20019-64-1 | 0.03 ± 0.02 (2) | 0.02 ± 0.02 (2) | 0.01 ± 0.03 (1) |
| 5-Methyl-5-vinyldihydrofuran-2(3H)-one | 1648 | 1073-11-6 | 0.01 ± 0.01 (2) | 0.01 ± 0.01 (1) | |
| Nitrogen-containing compounds | |||||
| 3-Methylpyrazole | 1654 | 1453-58-3 | tr (2) | 0.02 ± 0.01 (2) | 0.16 ± 0.08 |
| Benzyl isocyanide | 1657 | 10340-91-7 | 0.08 ± 0.03 | 0.02 ± 0.02 (2) | 0.01 ± 0.00 |
| Unknown compounds | |||||
| m/z: 53,81,82,54,50,55 | 1121* | 0.46 ± 0.17 | 0.18 ± 0.31 (1) | 0.32 ± 0.16 | |
| m/z: 91,96,119,67,95,41 | 1358* | 0.07 ± 0.02 | 0.06 ± 0.05 (2) | 0.36 ± 0.20 | |
| m/z: 73,56,59,86,72,55 | 1464* | 0.05 ± 0.04 | 0.03 ± 0.04 (2) | ||
| m/z: 91,107,43,92,65,79 | 1490* | 0.03 ± 0.03 (2) | 0.01 ± 0.01 (2) | 0.13 ± 0.11 | |
| m/z: 55,43,32,83,41,42 | 1501 | 0.02 ± 0.02 (3) | |||
| m/z: 95,93,123,67,91,81 | 1511* | 0.03 ± 0.02 (2) | 0.01 ± 0.01 (1) | 0.06 ± 0.01 | |
| m/z: 57,85,86,43,55,72 | 1524* | 0.28 ± 0.22 | |||
| m/z: 95,93,79,41,55,69 | 1525 | 0.06 ± 0.00 | |||
| m/z: 82,83,55,41,53,39 | 1546 | 0.01 ± 0.01 (2) | |||
| m/z: 43,71,57,70,41,55 | 1551 | 0.01 ± 0.02 (1) | |||
| m/z: 108,82,79,42,80,81 | 1650* | 0.03 ± 0.01 | |||
| m/z: 57,71,43,41,55,85 | 1666 | 0.01 ± 0.03 (1) | |||
| m/z: 60,91,73,107,79,150 | 1700* | 0.03 ± 0.00 | 0.01 ± 0.01 (2) | 0.09 ± 0.05 | |
| m/z: 83,55,84,57,82,112 | 1730 | 0.05 ± 0.10 (1) | |||
| m/z: 57,43,71,55,84,41 | 1742 | 0.01 ± 0.03 (1) | |||
| m/z: 82,67,71,43,81,79 | 1771* | 0.04 ± 0.01 | tr (1) | 0.02 ± 0.05 (1) | |
| m/z: 95,54,43,59,81,67 | 1844* | 0.01 ± 0.02 (1) | tr (2) | 0.04 ± 0.02 | |
| m/z: 95,43,55,59,81,67 | 1848* | tr (1) | tr (2) | 0.02 ± 0.00 | |
| m/z: 43,95,110,59,81,71 | 1890* | 0.04 ± 0.01 | |||
| m/z: 57, 85, 43, 41, 55, 39 | 1925* | 0.18 ± 0.20 | 0.01 ± 0.02 (2) | 0.51 ± 0.46 (3) | |
| m/z: 153,109,83,69,43,32 | 1940* | tr (2) | |||
| m/z: 71,43,41,39,53,69 | 1941* | tr (2) | tr (2) | 0.01 ± 0.01 (3) | |
| m/z: 59,71,43,53,55,113 | 1946* | 0.01 ± 0.00 (2) | 0.03 ± 0.02 | ||
| m/z: 59,42,71,55,41,113 | 1951* | tr (1) | 0.06 ± 0.05 (3) | ||
| m/z: 97,72,43,68,95,79 | 1964* | 0.07 ± 0.07 (2) | 0.02 ± 0.02 (2) | 0.11 ± 0.04 | |
| m/z: 43,125,83,107,81,55 | 1971* | 0.01 ± 0.02 (3) | |||
| m/z: 43,57,69,41,55,91 | 1972 | tr (1) | |||
| m/z: 97,67,41,72,68,43 | 1987* | 0.01 ± 0.01 (2) | 0.01 ± 0.01 (2) | 0.06 ± 0.03 | |
| m/z: 59,43,71,113,73,83 | 1993* | 0.04 ± 0.02 | |||
| m/z: 71,59,43,85,113,73 | 2004* | 0.02 ± 0.01 | |||
| m/z: 79,91,150,39,107,32 | 2030* | 0.02 ± 0.00 | 0.01 ± 0.01 (2) | 0.04 ± 0.01 | |
| m/z: 58,43,71,59,55,445 | 2104 | tr (1) | |||
| m/z: 43,111,32,41,91,93 | 2124* | tr (1) | 0.01 ± 0.00 (2) | 0.16 ± 0.13 | |
| m/z: 79,108,77,39,80,82 | 2127* | tr (1) | tr (2) | 0.02 ± 0.00 | |
| m/z: 43,95,59,41,55,79 | 2134* | tr (1) | tr (2) | tr (1) | |
| m/z: 121,149,138,194,93,65 | 2137 | tr (1) | |||
| m/z: 43,95,32,55,97,59 | 2141* | tr (1) | 0.01 ± 0.01 (2) | ||
| m/z: 95,43,97,41,83,59 | 2150* | tr (1) | 0.02 ± 0.02 (2) | 0.02 ± 0.01 | |
| m/z: 109,79,81,152,67,121 | 2154* | tr (1) | 0.01 ± 0.01 (2) | 0.03 ± 0.02 | |
| m/z: 74,87,43,41,55,75 | 2196 | tr (1) | |||
| m/z: 88,43,100,41,54,30 | 2236 | tr (1) | |||
| m/z: 69,93,41,81,79,91 | 2257 | 0.01 ± 0.01 (2) | |||
| Aliphaticalcohols | 1.63 ± 2.50 | 0.09 ± 0.08 | 2.32 ± 0.96 | ||
| Aliphaticaldehydes | 0.51 ± 0.83 | 0 | 0.75 ± 0.59 | ||
| Aliphaticalkanes | 0 | 0 | 0.42 ± 0.83 | ||
| Aliphaticesters | 1.53 ± 1.41 | 0 | 1.39 ± 0.91 | ||
| Benzenoid compounds | 0.14 ± 0.04 | 3.40 ± 5.79 | 0.22 ± 0.10 | ||
| Irregularterpene | 0.10 ± 0.05 | 0.04 ± 0.07 | 0.96 ± 0.67 | ||
| Monoterpenes | 93.55 ± 5.46 | 95.19 ± 4.57 | 89.77 ± 1.97 | ||
| Miscellaneous compounds | 0.15 ± 0.03 | 0.06 ± 0.06 | 0.13 ± 0.05 | ||
| nitrogen-containing compounds | 0.08 ± 0.04 | 0.04 ± 0.03 | 0.17 ± 0.07 | ||
| Unknown compounds | 1.13 ± 0.33 | 0.49 ± 0.50 | 2.87 ± 0.75 | ||