bundles appearing in normal stems (Fig. 5a) was interrupted in BPP
stems (Fig. 5b). Differences in the sclerenchyma tissue (beneath
the epidermis) were also apparent, with the BPP tissue having
significantly (P < 0.01) larger cells (11 cells in 100 mm2) with
thinner cell walls (Fig. 5d) than the normal sclerenchyma (15 cells
in 100 mm2; Fig. 5c).