Figure 4. Cold tolerance test of the transformed tomato plants.

Panel a. The appearance of the three test plants from one of the 3 groups on day 15 in chamber 2.
Frame 1 is a non-transformed plant; frame 2 and 3 are two transformed plants carrying the AB gene.

Panel b. The same plants as in panel A, but grown at 4ºC for additional 23 days.