Figure 2.

Representative patterns of secondary cell-wall lignin deposition in the endocarp b tissue for various species of the Brassicaceae family (as indicated) that are characterized by explosive (Cardamine) and non-explosive silique shattering. Top: Light microscopy transverse valve sections of mature fruit with cell walls stained with toluidine blue O. Bottom: Mature wild-type fruit. Phylogenetic relationships between species are shown in the cladogram. Scale bars: 10 mm, cells; 2 mm, fruit (reproduced with permission from Hofuis et al. [25]).