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Cell Water Potential Components in the Adaptation of Pseudoroegneria spicata (Pursh) A. Löve to Various Habitat Moisture Conditions
Margaret S. Dibble and George G. Spomer
Vol. 148, No. 1 (Mar., 1987), pp. 73-78
Published by: The University of Chicago Press
Stable URL: http://www.jstor.org/stable/2995385
Page Count: 6
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Tissue water potential components were measured over 2 growing seasons from the pressure-volume relations of leaf samples from three populations of bluebunch wheatgrass, Pseudoroegneria spicata, growing in different moisture conditions. Osmotic potentials differed among sites and declined as soil moisture decreased. Plants from each site grown in the same greenhouse exhibited differences in osmotic potentials and bulk elastic moduli, but the differences did not correspond to apparent habitat conditions. The ability to acclimate, rather than ecotypic differences, appears to explain the distribution of P. spicata in a wide range of moisture conditions.
Botanical Gazette © 1987 The University of Chicago Press