Cover Caption: Ethylene and Endomembranes

Ethylene inhibits the hypocotyl elongation in etiolated Arabi dopsis seedlings. Using transmission electron microscopy and genetic analyses, Xu et al. (pp 434–455) show that preventing basal level ethylene responses results in cortical endoplasmic reticulum proliferation, Golgi curvature, and cell wall separation in ein2 hypocotyl cells.