Table I. Amounts of free monoterpenes and monoterpenyl β-d-glucosides in different grapevine tissues of cv White Riesling 239-34 Gm and cv Gewurztraminer 11-18 Gm.
Plant material was prepared and analyzed as described in “Materials and Methods.” Except for roots, a continuous sampling at fixed time intervals took place. Plant materials are as follows: inflorescence 1, 4 weeks before flowering; inflorescence 2, 2 weeks before flowering; inflorescence 3, week of full bloom; leaf 1, 1 week old; leaf 2, 3 weeks old; and leaf 3, 5 weeks old. n.d., Not detectable. Amounts are listed in mg kg−1 plant material ( n = 2).
| Cultivar | Substrate | Free or Bound | Inflorescence 1 | Inflorescence 2 | Inflorescence 3 | Leaf 1 | Leaf 2 | Leaf 3 | Root |
|---|---|---|---|---|---|---|---|---|---|
| White Riesling 239-34 Gm | Linalool | Free | 0.17 ± 0.06 | n.d. | n.d. | 0.02 ± 0.04 | n.d. | n.d. | n.d. |
| β-d-Glucosides | 4.78 ± 1.64 | 3.18 ± 0.63 | 7.91 ± 4.09 | 1.41 ± 1.10 | 0.45 ± 0.31 | 1.14 ± 0.71 | n.d. | ||
| Nerol | Free | n.d. | n.d. | n.d. | 0.04 ± 0.06 | n.d. | n.d. | n.d. | |
| β-d-Glucosides | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | ||
| Geraniol | Free | 2.93 ± 0.28 | 2.07 ± 0.62 | 1.79 ± 0.39 | 3.57 ± 0.92 | 2.42 ± 0.29 | 0.74 ± 0.32 | 0.57 ± 0.19 | |
| β-d-Glucosides | 2.28 ± 0.93 | 2.00 ± 0.56 | 5.32 ± 1.86 | 3.01 ± 1.30 | 1.30 ± 0.11 | 2.42 ± 2.60 | 1.52 ± 0.68 | ||
| Citronellol | Free | 0.39 ± 0.20 | 0.42 ± 0.21 | n.d. | n.d. | n.d. | n.d. | 0.27 ± 0.02 | |
| β-d-Glucosides | 0.06 ± 0.09 | n.d. | n.d. | 0.28 ± 0.20 | n.d. | 0.19 ± 0.10 | n.d. | ||
| Total | Free | 3.49 | 2.49 | 1.79 | 3.63 | 2.42 | 0.74 | 0.84 | |
| β-d-Glucosides | 7.12 | 5.18 | 13.23 | 4.70 | 1.75 | 3.75 | 1.52 | ||
| Gewurztraminer 11-18 Gm | Linalool | Free | 0.32 ± 0.01 | 0.28 ± 0.04 | 0.44 ± 0.03 | 0.28 ± 0.02 | n.d. | n.d. | n.d. |
| β-d-Glucosides | 10.74 ± 1.13 | 10.43 ± 0.04 | 106.25 ± 45.92 | 2.60 ± 1.52 | 0.98 ± 0.13 | 0.67 ± 0.07 | n.d. | ||
| Nerol | Free | 0.66 ± 0.38 | 0.28 ± 0.09 | n.d. | n.d. | n.d. | n.d. | n.d. | |
| β-d-Glucosides | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | ||
| Geraniol | Free | 20.63 ± 12.63 | 7.7 ± 2.4 | 9.33 ± 0.57 | 8.07 ± 0.18 | 3.12 ± 0.55 | 2.06 ± 0.16 | 1.20 ± 0.19 | |
| β-d-Glucosides | 7.90 ± 1.52 | 5.46 ± 0.90 | 94.22 ± 16.03 | 1.95 ± 1.23 | 2.67 ± 2.60 | 0.47 ± 0.10 | 8.26 ± 3.62 | ||
| Citronellol | Free | 1.46 ± 0.85 | 1.32 ± 0.41 | n.d. | n.d. | n.d. | 0.08 ± 0.13 | 0.18 ± 0.01 | |
| β-d-Glucosides | 1.00 ± 0.20 | 0.75 ± 0.1 | 1.27 ± 1.79 | 0.17 ± 0.08 | n.d. | n.d. | 0.96 ± 1.36 | ||
| Total | Free | 23.07 | 9.58 | 9.77 | 8.35 | 3.12 | 2.14 | 1.38 | |
| β-d-Glucosides | 19.64 | 16.64 | 201.74 | 4.72 | 3.65 | 1.14 | 9.22 |