Figure 39.

The affect of GA synthesis and perception mutants on valve development. (A) Longitudinal section through a stage 17 valve, 7 days after pollination. The exocarp (X), mesocarp (M), enb (T), and ena (E) are labeled. (B) Longitudinal section through a ga5 valve after pollination. The valve cells, especially the mesocarp cells, expand more laterally and have fewer divisions. (C) The gai valves look similar to the ga5 valves. (D) Valves of wild-type unfertilized parthenocarpic fruit induced with 10mM auxin, which appear similar to the gai and ga5. A-D: from Vivian-Smith and Koltunow, 1999.