Figure 2.

MeJA downregulated SlSBPASE expression, reduced sedoheptulose-1,7-bisphosphatase (SBPase) activity, and decreased carbon assimilation rates in detached tomato leaves treated with MeJA for 4 d. (A) Analysis of SlSBPASE expression level. The expression level in the leaves without MeJA treatment for day 1 was set to 1, and the relative expression levels in the rest of samples were calculated accordingly. (B) Quantification of SBPase activity. (C) CO₂ assimilation rates. The values presented are means ± SDs (n = 3). Asterisks indicate significant difference at ** p < 0.01 between leaves treated with MeJA and control leaves.