Figure 2From: Extensin network formation in Vitis vinifera callus cells is an essential and causal event in rapid and H2O2-induced reduction in primary cell wall hydrationScanning electron micrographs of typical cell walls in fractured grapevine callus cells. A) Untreated; B) incubated with H2O2. Scale bars equivalent to 1 μm are indicated in the bottom, right hand corners of the panels. Both samples were equilibrated in 15 mM KCl prior to freeze-fracture.Back to article page