Fig. 3.

Relative distribution of thapsigargin, thapsigargicin and nortrilobolide from Thapsia garganica (A) within the different plant tissues, (B) between different sampling locations that had differing intensities of mammalian herbivory, and (C) over time. There was significant variation in all three thapsigargins between plant parts, while significant variation between sites was limited to thapsigargicin and nortrilobolide. Due to sampling limitation, only variation in the inner roots and root periderms from time points 1 and 2 underwent statistical analyses for temporal variation, with only thapsigargin in the inner roots varying significantly temporally.