Figure 6.

The Cell Type–Specific Localization of Protoberberine Alkaloid Gene Transcripts and Product Accumulation Are Temporally and Spatially Distinct in T. flavum Roots and Rhizomes, Respectively.

(A) Model showing the relationship between the sites of protoberberine alkaloid biosynthetic gene expression (blue) and alkaloid accumulation (yellow) in a root.

(B) Model showing the relationship between the sites of protoberberine alkaloid biosynthetic gene expression (blue) and alkaloid accumulation (yellow) in a rhizome.

ap, apical meristem; co, cortex; en, endodermis; pi, pith; va, vascular tissue.