<p><b>a</b>, Flg22-induced ROS production in the <i>psig1</i> mutants. Data are shown as the mean ± SE. <b>b</b>, Flg22-induced MAPK activation in the <i>psig1</i> mutants. <b>c</b>, Flg22-induced callose deposition in the <i>psig1</i> mutants. Callose deposition was quantified with Image J software. Data are shown as the mean ± SE. Statistical groups were determined using the Tukey HSD test. Statistically significant differences are indicated by different letters (<i>p</i> < 0.05). The scale bar represents 200 μm. <b>d</b>, The <i>psig1-1</i> mutant has a slight dwarf phenotype. Photograph of 6-week-old plants grown under short day conditions. <b>e</b>, <i>PR1</i> gene expression in 10-day-old seedlings. Data are shown as the mean ± SE. Statistical groups were determined using the Tukey HSD test. Statistically significant differences are indicated by different letters (<i>p</i> < 0.01). <b>f</b>, Flg22-induced ROS production in the <i>psig1-1 sid2-2</i> mutants. Data are shown as the mean ± SE. <b>g</b>, Flg22-induced ROS production in the <i>psig1-1 rbohD</i> mutants. Data are shown as the mean ± SE.</p
