Fig. 3.

Effects of methyl jasmonate (MeJA) on the thickness of the cuticle and epidermal cell wall. (A) A light micrograph showing a cross-section of soybean leaf, with the red rectangle showing the area in (B), (B) Light micrographs showing the cuticle and epidermal cell wall thickness (the blue layer above the epidermal cells) of 0 and 1 mm MeJA-treated leaves of soybean, sunflower and tomato (the scale bar applies to all images), (C) Comparison of leaf cuticle and epidermal cell wall thickness of 0 and 1 mm MeJA-treated leaves of soybean, sunflower and tomato. Values are the mean with the SD (n = 4). Within each plant species, P-values < 0·05 between 0 and 1 mm MeJA are indicated with an asterisk (*).