Figure 7.

Inflorescence bending after gravistimulation in the cold is attenuated in the transgenic plants. A, Arabidopsis plants containing inflorescence stems (6–9 cm long) were gravistimulated in the cold by placing the plants horizontally at 4°C in the dark for 1 h. Plants were returned to room temperature and placed vertically in the dark. B, Bending was monitored every 15 min for 2 h after being returned to room temperature. The graph shows the average of five representative inflorescence stems for each line ±se. The experiment was carried out four times with similar results. C, Representative wild-type and InsP 5-ptase transgenic inflorescence stems photographed immediately after being returned to vertical at room temperature (0 min) and after 45 and 120 min.