FIGURE 2. The internal anatomy of the leaves in Capparis
odoratissima . (a) Cross-section of the leaf displaying autofluorescence
of the numerous ididoblasts that traverse the mesophyll and connect the
adaxial and abaxial leaf surfaces. (b) Thick cuticle layer (white
arrowheads) on the adaxial epidermis of the leaf, but notably thinner
above the idioblasts, stained with auramine O for cutin and lipids
(yellow, arrows). (c) The thick walls of the idioblasts contain massive
cellulose (stained with calcofluor white, blue color). (d) The cuticle
of the abaxial surface (arrows) is thinner, rugose and accumulates
massively at the base of the peltate hairs. (e) Idioblasts directly
connect with the center of the peltate hairs. Ep, epidermis; pp,
palisade parenchyma; id, idioblast; sp, spongy parenchyma; ph, peltate
hair. Scale bars: a,d,e = 50µm; b,c = 20µm.