Fig 2. Capacity of the epidermal cell wall to expand.

The capacity of the epidermal cell wall to expand was measured by using frozen-thawed epidermal strips of the youngest expanding leaf in a region that had emerged from the sheath. The maximal capacity of the epidermal cell walls to expand as measured with a linear variable differential transducer was plotted in millimetres over time. Light-grey, sensitive hybrid Lector; dark-grey, resistant hybrid SR03. Extension kinetics of salt-stress treatments were normalised by the corresponding control treatments. Representative kinetics of 8 equivalent recordings.