Figure 2.

Physiological analysis of chs2 mutant plants. A, Ion leakage assay in chs2 plants. Plants grown at 22°C for 3 weeks were then treated at 4°C for the indicated times. The data represent means of three replicates ± sd. Similar results were observed in three independent experiments. B, Pro content in chs2 plants. Plants grown at 22°C for 3 weeks were treated at 4°C for 6 d. The data represent means of four replicates ± sd. * P < 0.01 (t test), significant difference from Col. Similar results were observed in three independent experiments. FW, Fresh weight.