Figure 1.

Representative example of Arabidopsis accession Col-0 treated with air (A) or 5 μL L⁻¹ ethylene (B) for 24 h. The petiole-leaf blade junction of the leaf under examination is marked with drawing ink (see arrows). A calibration object is placed in the same plane as the marked petiole. A black square on the calibration object has a dimension of 5 × 5 mm. α, Petiole angle.