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Fig. 3 | Plant Methods

Fig. 3

From: Characterization of essential oil distribution in the root cross-section of Valeriana officinalis L. s.l. by using histological imaging techniques

Fig. 3

A Schematic illustration of a root-slice segment with the identified elements center (C), oil droplets (D, labeled is one oil droplet) and the root edge (E). ϕ indicates the polar angle with C as pole and the x-axis (horizontal line) as polar axis. B Generalized illustration of the nine classes (1–9), to which the oil droplets (pp, Formula IV) were assigned based on their relative distance to the center

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Plant Methods

ISSN: 1746-4811