Table 1.
Root morphology types and content of essential oil in the root drug of the cloned elite plants (CE)
| Cloned elites | Varieties | Morphological root structure | Essential oila | Root fraction (diameter) | |||
|---|---|---|---|---|---|---|---|
| Classification | ml kg−1 | RF1 (< 2 mm)b | RF2 (< 3 mm)b | RF3 (< 4 mm)b | RF4 (> 4 mm)b | ||
| CE1 | ‘Anton’ | Thin-rooted | 8.9 (14.1) | ● | ● | ● | — |
| CE2 | ‘Anton’ | Thin-rooted | 10.4 (19.9) | ● | ● | ● | |
| CE3 | ‘Anton’ | Thick-rooted | 5.0 (12.9) | ● | ● | ● | ● |
| CE4 | ‘Lubelski’ | Thick-rooted | 6.9 (11.3) | ● | ● | ● | ● |
Prevalence of root thickness fractions (RF) in the clone plants
aEssential oil content of the mother plant (elites) and in brackets the cloned elites, determined in 2010 and 2012, respectively
bDiameter at the base (Horizon 1, see Fig. 1) is decisive for the classification to a fraction. The ● indicates the formed and the — indicates the not formed fractions