Figure 4.

Inhibitory effects of U73122 and 2-APB on Pro accumulation upon salt stress were partially reversible in Arabidopsis seedlings. Seedlings were prepared as described in the legend to Figure 1. Seedlings were treated with either U73122 (100 μm) or 2-APB (100 μm) and grown under normal conditions or in the presence of 200 mm NaCl for 24 h (white bars). Seedlings were then washed and transferred onto NaCl medium (black bars) for another 24 h.