Figure 6.

Longitudinal carpel wall sections of Ler at anthesis (a) and at 7 DPA for an unpollinated silique (b), a pollinated silique (c), and parthenocarpic siliques induced by 10 μmol GA₃ pistil⁻¹ (d), 1 μmol BA pistil⁻¹ (e), 10 μmol NAA pistil⁻¹ (f). g to l, Silique wall sections of the respective Ler treatments in the gai background. Carpel wall sections of spy-4 anthesis pistil (m) and 7 at DPA for an unpollinated pistil (n), pollinated silique (o), and emasculated spy-4 pistil induced to grow with 10 μmol GA₃ pistil⁻¹ (p). Rescue of carpel wall structure in the ga5-1 biosynthetic mutant, 7-d pollinated ga5-1 silique (q), ga5-1 parthenocarpic silique induced with 10 μmol GA₃ pistil⁻¹ (r). X, Exocarp; M, mesocarp; T, supportive sclerenchyma; E, endocarp; O, ovule; F, funiculus. Scale bar = 100 μm.