Fig. 4

Representative images of aniline blue-stained stigmas from thebkn1 bkn2mutants.a-d.Aniline blue-stained pistils, following 2 h pollination with Col-0 pollen. Brightfield images (left) show pollen grains adhered to the stigmatic papillae, and fluorescent images (right) show aniline blue-stained pollen tubes (a),bkn1–3 bkn2–3(b),bkn1–3 bkn2–4(c) andbkn1–3 bkn2–5(d). All show similar levels of pollen adhesion and pollen tube growth. Scale bar = 100 μm