Effect of Salinity on Water Relations of Two Growth Forms of Suaeda calceoliformis

Suaeda calceoliformis, a succulent annual halophyte which occurs at Big Salt Marsh (Stafford Co., Kansas, USA), has erect and prostrate growth forms. 2. The two growth forms have similar leaf osmotic potentials over a wide range of salinities (0-5% NaCl), while leaf water (ψ) and pressure (ψ p ) potentials are higher for prostrate individuals. 3. To determine the basis for differences in ψ and ψ p between the two growth forms, pressure-volume (PV) curves were constructed for individuals of each growth form at 3 and 5% NaCl