Abstract
Osmotic potentials and individual epidermal cell turgor pressures were measured in the leaves of seedlings of Suaeda maritima growing over a range of salinities. Leaf osmotic potentials were lower (more negative) the higher the salt concentration of the solution and were lowest in the youngest leaves and stem apices, producing a gradient of osmotic potential towards the apex of the plant. Epidermal cell turgor pressures were of the order of 0.25 to 0.3 MPa in the youngest leaves measured, decreasing to under 0.05 MPa for the oldest leaves. This pattern of turgor pressure was largely unaffected by external salinity. Calculation of leaf water potential indicated that the gradient between young leaves and the external medium was not altered by salinity, but with older leaves, however, this gradient diminished from being the same as that for young leaves in the absence of NaCl, to under 30% of this value at 400 mM NaCl. These results are discussed in relation to the growth response of S. maritima.
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Buchner, K.-H., Zimmermann, U., Bentrup, F.-W. (1980) Turgor pressure and water transport properties of suspensioncultured cells of Chenopodium rubrum. L. Planta 151, 95–102
Cram, W.J. (1976) Negative feedback regulation of transport in cells. The maintenance of turgor, volume and nutrient supply. In: Encyclopedia of plant physiology, N.S., Transport in plants II A. Cells, vol. 2A, pp. 284–316, Luttge, U., Pitman, M.G. eds. Springer, Berlin Heidelberg New York
Cram, W.J. (1980) Chloride accumulation as a homeostatic system: negative feedback signals for concentration and turgor maintenance differ in a glycophyte and a halophyte. Aust. J. Plant Physiol. 7, 237–249
Flowers, T.J. (1975) Halophytes. In: Ion transport in plant cells and tissues, pp. 161–191, Hall, J.L., Baker, D.A., eds. North Holland, Amsterdam
Flowers, T.J. (1985) The physiology of terrestrial halophytes. In: Proc. Third Biosalinity Workshop. Pasternak, D., San Pietro, A. eds. W. Junk, The Hague, in press
Flowers, T.J., Troke, P.F., Yeo, A.R. (1977) The mechanism of salt tolerance in halophytes. Annu. Rev. Plant Physiol. 28, 89–121
Gale, J., Zeroni, M. (1985) Response of plants to salinity in desert controlled-environment agriculture (CEA) — a model for plant-salinity-environment interactions. In: Proc. Third Biosalinity Workshop, Pasternak, D. and San Pietro, A. eds. W. Junk, The Hague, in press
Gorham, J., Wyn Jones, R.G. (1983) Solute distribution in Suaeda maritima. Planta 157, 344–349
Hajibagheri, M.A., Hall, J.L., Flowers, T.J. (1983) The structure of the cuticle in relation to cuticular transpiration in leaves of the halophyte Suaeda maritima (L.) Dum. New Phytol. 94, 125–131
Hajibagheri, M.A., Hall, J.L., Flowers, T.J. (1984) Stereological analysis of leaf cells of the halophyte Suaeda maritima (L.) Dum. J Exp. Bot. 35, 1547–1557
Harvey, D.M.R., Hall, J.L., Flowers, T.J., Kent, B. (1981) Quantitative ion localization within Suaeda maritima leaf mesophyll cells. Planta 151, 550–560
Hüsken, D., Steudle, E., Zimmermann, U. (1978) Pressure probe techniques for measuring water relations of cells in higher plants. Plant Physiol. 61, 158–163
Lockhart, J.A. (1965) An analysis of irreversible plant cell elongation. J. Theor. Biol. 8, 264–275
Munns, R., Greenway, H., Kirst, G.O. (1983) Halotolerant eukaryotes. In: Encyclopedia of plant physiology, N.S., vol 12C: Physiological plant ecology III, pp. 59–135, Lange, O.L., Nobel, P.S., Osmond, C.B., Ziegler, H. eds. Springer, Berlin Heidelberg New York
Nobel, P.S. (1983) Biophysical plant physiology and ecology, pp. 61–78, Freeman, San Francisco
Steudle, E., Lüttge, U., Zimmermann, U. (1975) Water relations of the epidermal bladder cells of the halophyte species Mesembryanthemum crystallinum: Direct measurement of hydraulic pressure and hydraulic conductivity. Planta 126, 229–246
Steudle, E., Tyerman, S.D., Wendler, S. (1983) Water relations of plant cells. In: Effects of stress on photosynthesis, pp. 95–109, Marcelle, R., Clijsters, H., Pouche, M. van, eds. Dr. W. Junk, Hague Boston London
Steiner, M. (1939) Die Zusammensetzung des Zellsaftes bei höheren Pflanzen in ihrer ökologischen Bedeutung. Ergeb. Biol.l 17, 151–254
Stout, P.R., Arnon, E.I. (1939) Experimental methods for the study of the role of copper, manganese and zinc in the nutrition of higher plants. Am. J. Bot. 26, 144–149
Tomos, A.D. (1985) The Physical limitations of leaf cell expansion. S.E.B. Symposium, in press
Tomos, A.D., Steudle, E., Zimmermann, U., Schulze, E.-D. (1981) Water relations of leaf epidermal cells of Tradescan tia virginiana. Plant Physiol. 68, 1135–1143
Tomos, A.D., Wyn Jones, R.G. (1982) Water relations in the epidermal cells of the halophyte Suaeda maritima. In: Biophysics of water. pp. 327–331, F. Franks, S.F. Mathias, eds. Wiley, New York London
Waisel, Y. (1972) The biology of halophytes. Academic Press, New York
Westgate, M.E., Boyer, J.S. (1984) Transpiration and growth-induced water potentials in maize. Plant Physiol. 74, 882–889
Wyn Jones, R.G., Storey, R., Leigh, R.A., Ahmad, N., Pollard, A. (1977) A hypothesis on cytoplasmic osmoregulation. In: Regulation of cell membrane activities in plants, pp. 121–136, E. Marre, O. Ciferri, eds. Elsevier/North Holland Biomedical Press, Amsterdam
Yeo, A.R. (1974) Salt tolerance in Suaeda maritima. D. Phil. thesis, University of Sussex
Yeo, A.R. (1981) Salt tolerance in the halophyte Suaeda maritima L. Dum.: Intracellular compartmentation of ions. J. Exp. Bot. 32, 487–497
Yeo, A.R., Flowers, F.J. (1980) Salt tolerance in the halophyte Suaeda maritima L. Dum.: Evaluation of the effect of salinity upon growth. J. Exp. Bot. 31, 1171–1183
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Clipson, N.J.W., Tomos, A.D., Flowers, T.J. et al. Salt tolerance in the halophyte Suaeda maritima L. Dum.. Planta 165, 392–396 (1985). https://doi.org/10.1007/BF00392237
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DOI: https://doi.org/10.1007/BF00392237