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Measurement of a growth-induced water potential gradient in tall fescue leaves

Abstract : Spatial distribution of cell turgor pressure, cell osmotic pressure and relative elemental growth rate were measured in growing tall fescue leaves (Festuca arundinacea). Cell turgor pressure (measured with a pressure probe) was c. 0.55 MPa in expanding cells but increased steeply ( 0.3 MPa) in cells where elongation had stopped. However, cell osmotic pressure (measured with a picolitre osmometer) was almost constant at 0.85 MPa throughout the leaf. The water potential difference between the growth zone and the mature zone (0.3 MPa) was interpreted as a growth-induced water potential gradient. This and further implications for the mechanism of growth control are discussed.
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https://hal.inrae.fr/hal-02699158
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Submitted on : Monday, June 1, 2020 - 12:33:24 PM
Last modification on : Tuesday, September 7, 2021 - 3:34:25 PM

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Pierre Martre, Marie-Béatrice Bogeat-Triboulot, Jean Louis Durand. Measurement of a growth-induced water potential gradient in tall fescue leaves. New Phytologist, Wiley, 1999, 142, pp.435-439. ⟨10.1046/j.1469-8137.1999.00405.x⟩. ⟨hal-02699158⟩

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