Plant Physiol. Journal of Pharmacology and Experimental Therapeutics
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Plant Physiology 83:418-422 (1987)
© 1987 American Society of Plant Biologists

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Environmental and Stress Physiology

Alteration of Cell-Wall Water Content and Elasticity in Douglas-Fir during Periods of Water Deficit 1

Robert J. Joly2 and Joe B. Zaerr

Department of Forest Science, Oregon State University, Corvallis, Oregon 97331

Three populations of seedlings of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) were subjected to recurrent drought cycles. Pressure-volume curves were developed to derive the osmotic and pressure potentials as functions of the symplastic water over a wide range of relative water content. The drought cycles induced large reversible changes in the relative water content of the apoplasm and in the bulk modulus of elasticity. These responses have not been reported previously in any species of higher plant. Our data suggest that turgor regulation in Douglas-fir is mediated by structural and biochemical factors associated with the cell wall, rather than by osmotic adjustment.

2 Present address: Department of Horticulture, Purdue University, West Lafayette, IN 47907

1 Financial support was provided by the United States Department of Interior Bureau of Land Management and United States Department of Agriculture Forest Service under the auspices of the Southwest Oregon Forestry Intensified Research (FIR) Program. Paper 1932, Forest Research Laboratory, Oregon State University, Corvallis.




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 Plant Cell PhysiolHome page
T. Saito, K. Soga, T. Hoson, and I. Terashima
The Bulk Elastic Modulus and the Reversible Properties of Cell Walls in Developing Quercus Leaves
Plant Cell Physiol., June 1, 2006; 47(6): 715 - 725.
[Abstract] [Full Text] [PDF]


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Copyright © 1987 by the American Society of Plant Biologists