Figure 2.

Sucrose and starch synthesis as a function of temperature in tomato with and without a SPS gene from maize. Squares are data from transformed plants, and circles are from untransformed plants. The proportion of sucrose synthesis from CO₂ fixation increases with temperature, while starch synthesis declines. The SPS gene had little effect on the rate of photosynthesis, which increased over a temperature range of 14 °C to 29 °C. Data are from Laporte (1997).