Figure 4.

Effect of stress on root length and leaf area growth of Arabidopsis plants. (A) Measurement of Col-0 and bac2-1 root length 9 days after sowing on increasing concentrations of mannitol to trigger an hyperosmotic stress. (B) The area of the first two leaves of 8-day-old Arabidopsis was measured prior to any treatment and 1 week after transfer to soil in either non-stressed control plants or stressed plants (24 h on 0.4 M mannitol). Col-0, wild type Arabidopsis; bac2-1, KO mutant bac2-1. Letters refer to statistically different values with significance of p < 0.05 (n > 40) in the Student t-test.