Fig. 2. Expression of the Amstm gene. In situ hybridisation was used to detect expression of the Amstm gene in (A) wild-type seedlings, (B) phan hb double mutant seedlings, (C) wild-type vegetative apices, (D) vegetative apices of phan single mutants, and phan hb double mutant apices that were still active (E) or had terminated growth (F). Arrowheads indicate expression in the axils of leaves.