In situ hybridization to demonstrate
StGCPRP mRNA in cross-sections of leaves. a, b, e, and
f, Hybridization with the StGCPRP antisense probe; c, d,
g, and h, hybridization with the StGCPRP sense control
probe. a through d, Mature leaves; e through h, very young leaves. Note
strong expression in guard cells (arrowhead) as well as expression in
mesophyll cells (f). e, Epidermal cell layer; p, pallisade parenchyma
cells; s, spongy parenchyma cells; t, trichome. Bar = 50 μm.