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This article in AJ

  1. Vol. 69 No. 5, p. 894-896
    Received: July 14, 1976

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Estimating Leaf Water Potential in Safflower1

  1. A. R. Sepaskhah2



The pressure chamber technique Ls used (or rapid measurements of plant water potential. Comparison of this method with thermocouple psychrometer technique is required at various stages of growth for different crops. Xylem water potential estimated by pressure chamber and leaf water potential measured by thermocouple psychrometer were correlated for safflower (Carthamus tinctorius L.) leaves at vegetative and flowering stages of growth in greenhouse conditions. The results of the two methods were linearly related for both growth stages but the equations were different at the 1% level. The values of ordinate intercept were nearly equivalent to the xylem sap osmotic potentials at the both stages of growth.

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