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Estimating Leaf Water Potential in Safflower 1
Author(s) -
Sepaskhah A. R.
Publication year - 1977
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1977.00021962006900050044x
Subject(s) - carthamus , hygrometer , xylem , osmotic pressure , thermocouple , greenhouse , transpiration , agronomy , horticulture , botany , biology , photosynthesis , materials science , humidity , thermodynamics , medicine , physics , composite material , traditional medicine
The pressure chamber technique is used for 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.