Figure 3.

The effect of the chs2 mutation on chloroplast development under cold stress. Wild-type Col and chs2 plants were grown at 22°C for 3 weeks and then treated at 4°C for 10 d. A, Chlorophyll content of Col and chs2 seedlings. 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. B, Transmission electron microscopy of plastids from chs2 plants. Bar = 5 μm (top row) and 2 μm (bottom row). Images are of representative plants.