Table 4.
Contents of hop essential oils (average ± SD) in dry cones of HLVd-free and infected plants of the Sládek, Premiant, and Agnus cultivars.
| Cultivar | Sládek | Premiant | Agnus | |||
|---|---|---|---|---|---|---|
| HLVd infection | Negative | Positive | Negative | Positive | Negative | Positive |
| Number of samples | 7 | 4 | 2 | 2 | 2 | 2 |
| Total oils (% of DW) | 1.836 ± 0.403 | 1.385 ± 0.130 * | 1.270 ± 0481 | 1.085 ± 0.417 | 2.005 ± 0.813 | 1.775 ± 0.488 |
| Monoterpenes (% of EO) | ||||||
| Myrcene | 34.06 ± 1.68 | 30.05 ± 5.60 | 29.65 ± 9.69 | 28.95 ± 4.03 | 32.35 ± 5.59 | 32.20 ± 5.37 |
| α-pinene | 0.087 ± 0.013 | 0.098 ± 0.025 | 0.070 ± 0.014 | 0.090 ± 0 | 0.165 ± 0.050 | 0.195 ± 0.007 |
| β-pinene | 0.677 ± 0.024 | 0.798 ± 0.139 ** | 0.595 ± 0.233 | 0.720 ± 0.113 | 1.055 ± 0.007 | 1.275 ± 0.304 |
| Sesquiterpenes (% of EO) | ||||||
| α-humulene | 29.73 ± 1.27 | 31.50 ± 4.37 | 33.10 ± 7.21 | 33.65 ± 7.57 | 22.50 ± 0.57 | 20.55 ± 2.19 |
| β-caryophyllene | 12.20 ± 0.64 | 13.18 ± 2.15 | 10.90 ± 1.70 | 10.76 ± 1.48 | 13.80 ± 0.42 | 13.10 ± 1.41 |
| β-farnesene | 0.103 ± 0.119 | 0.093 ± 0.085 | 2.540 ± 0.255 | 1.885 ± 0.714 | 0.280 ± 0.071 | 0.185 ± 0.064 |
| γ-muurolene | 1.120 ± 0.180 | 1.113 ± 0.147 | 0.925 ± 0.085 | 0.800 ± 0 | 1.180 ± 0.170 | 1.220 ± 0.130 |
| β-bisabolene | 0.201 ± 0.172 | 0.048 ± 0.082 | 0.060 ± 0.060 | 0.165 ± 0.165 | 0 | 0 |
| γ-cadinene | 1.077 ± 0.039 | 1.153 ± 0.172 | 0.975 ± 0.105 | 1.153 ± 0.172 | 1.235 ± 0.145 | 1.250 ± 0.130 |
| δ-cadinene | 1.864 ± 0.109 | 2.018 ± 0.311 | 1.705 ± 0.205 | 1.570 ± 0.080 | 1.910 ± 0.170 | 1.830 ± 0.250 |
| Selinenes | 1.240 ± 0.247 | 1.158 ± 0.400 | 1.440 ± 0.240 | 1.100 ± 0.198 | 2.910 ± 0.655 | 2.940 ± 0.622 |
| Alcohols (% of EO) | ||||||
| Linalool | 0.240 ± 0.028 | 0.310 ± 0.075 ** | 0.605 ± 0.262 | 0.600 ± 0.035 | 0.570 ± 0.113 | 0.625 ± 0.035 |
| Geraniol | 0.200 ± 0.064 | 0.343 ± 0.056 *** | 0.050 ± 0.028 | 0.175 ± 0.021 ** | 0.740 ± 0.311 | 0.730 ± 0.325 |
| EpoxidesA (% of EO) | 0.547 ± 0.396 | 1.178 ± 0.553 * | 0.280 ± 0.028 | 0.235 ± 0.035 | 2.315 ± 0.813 | 3.140 ± 0.354 |
| KetonesB (% of EO) | 2.934 ± 0.632 | 2.330 ± 0.756 | 3.325 ± 0.813 | 1.990 ± 0.057 | 1.120 ± 0.057 | 1.180 ± 0.141 |
| Esters (% of EO) | ||||||
| Methylgeranate | 0.330 ± 0.147 | 1.030 ± 0.301 *** | 0.198 ± 0.139 | 0.405 ± 0.163 | 2.480 ± 0.368 | 2.950 ± 0.297 |
| Methylheptanoate | 0.407 ± 0.067 | 0.330 ± 0.149 | 0.395 ± 0.064 | 0.355 ± 0.064 | 0.190 ± 0.028 | 0.225 ± 0.212 |
| Methyloctanoate | 0.837 ± 0.238 | 0.618 ± 0.303 | 0.315 ± 0.021 | 0.295 ± 0.177 | 0.225 ± 0.021 | 0.260 ± 0.071 |
| Methylnon-6-enoate | 0.044 ± 0.013 | 0.058 ± 0.015 | 0.060 ± 0.028 | 0.080 ± 0.028 | 0.040 ± 0.014 | 0.040 ± 0.014 |
| Methyl-8-methylnonanoate | 0.084 ± 0.026 | 0.065 ± 0.033 | 0.110 ± 0.014 | 0.060 ± 0 ** | 0.195 ± 0.007 | 0.200 ± 0.014 |
| Methyldeca-4,8-dienoate | 0.513 ± 0.089 | 0.628 ± 0.213 | 0.570 ± 0.255 | 0.865 ± 0.431 | 0.340 ± 0.057 | 0.390 ± 0.127 |
| Methyldecanoate | 0.410 ± 0.127 | 0.270 ± 0.123 | 0.245 ± 0.021 | 0.160 ± 0.071 | 0.125 ± 0.035 | 0.150 ± 0.071 |
| Methyldodeca-3,6-dienoate | 0.390 ± 0.288 | 0.145 ± 0.290 | 0.285 ± 0.403 | 0.265 ± 0.375 | 0 | 0 |
Probability level: *—p < 0.1, **—p < 0.05, and ***—p < 0.01. Abbreviations: DW—dry weight; EO—essential oils; A Epoxides—sum of caryophyllene epoxide, humulene epoxide I a II; and B Ketones—sum of 2-nonanone, 2-decanone, 7-Me-2-decanone, 2-undecanone, and 2-tridecanone.