Research Article

Dual Role of Hydrogen Peroxide in Arabidopsis Guard Cells in Response to Sulfur Dioxide

Figure 1

Promotion of stomatal closure by SO2 and its reversibility upon SO2 removal. Stomata of Arabidopsis leaf epidermis were allowed to open in light [(a) and (c)] or to close in the dark (b) for 2 h and then were incubated for 2 h in SO2 hydrates. b, A significant difference at from control. c, A significant difference at between SO2 treatment and its recovery group.
407368.fig.001a
(a)
407368.fig.001b
(b)
407368.fig.001c
(c)