Figure 2. Transgenic cassava shows enhanced resistance to cold stress. (A) Two-mo-old cassava subjected to 4°C for 2 d in a chamber displaying phenotypic changes; (B) MDA contents in cassava leaves exposed to 4°C for 2 d; (C) and (D) SOD and CAT activity changes in cassava leaves exposed to 4°C for 2 d. Values represent the means of three independent experiments ± SD. The double asterisks indicate a statistically significant difference (p < 0.01) by t-test for the data of the stress-treated samples compared with those of the WT samples.