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

Figure 2

Effects of antioxidants and calcium antagonists on SO₂-induced stomatal closure and H₂O₂ elevation in Arabidopsis guard cells. Different superscript letters indicate significant differences (). The same letters indicate no significant difference. The green fluorescence (DCFH-DA) of guard cells indicates H₂O₂ content.