FIGURE 7. Immunolocalization of pectins (JIM7 mAb; purple color) and arabinogalactan proteins (JIM8 mAb; red color) inCapparis odoratissima leaves in transverse ( a, c, f, g) and paradermal (b, d, e) sections. (a, b) High levels of pectins (arrows) were indicated in the apoplast of epidermal cells, particularly between the cuticle and the cell walls of the epidermis (dotted lines indicate the profile of an idioblast). (c) In contrast, AGPs epitopes (arrows) were present in the lumen of the idioblasts (dotted line). (d) Pectins (arrows) were also present in the external cell walls of the spongy mesophyll in contact with the idioblasts (dotted line). (e) Arabinogalactan protein epitopes (arrows) showed a consistent presence along the lumen of idioblasts (dotted line). (f) The external walls of the peltate hairs showed a consistent presence of pectins (arrows). (g) The lumens of the peltate hairs further contained AGPs (arrows), consistent with their presence along the idioblast-hair continuum. C, cuticle; ep, epidermis; pp, palisade parenchyma; id, idioblast; sp, spongy parenchyma; ph, peltate hair. Scale bars: 20µm.