Results 261 to 270 of about 200,037 (304)
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An Error in the Calibration of Xylem-water Potential against Leaf-water Potential
Journal of Experimental Botany, 1971An error occurs in the calibration of xylem pressure potential (Ta;) against leaf-water potential (Tir) when the calibration is made using plant material in which the water stress has been induced artificially after excision. The imposition of water stress after excision affects the T'a: determination more than it affects Tw, consequently the ...
D. W. WEST, D. F. GAFF
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Effect of Excision on Leaf Water Potential
Journal of Experimental Botany, 1984Improvements of thermocouple hygrometrie techniques for in situ leaf water potential measurement in the field now allows for continuous monitoring of water potential in response to an external perturbation, such as leaf excision. Using Citrus jambhiri plants, measured leaf water potentials of completely excised leaf portions immediately increased when ...
M. J. SAVAGE, A. CASS, H. H. WIEBE
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Variation of leaf conductance and leaf water potential in apple orchards
Journal of Horticultural Science, 1984SummaryThe major random and non-random sources of variation in leaf conductance (g1) and leaf water potential (ψ1) in apple trees were determined from many separate experiments. The variances of both g1 and ψ1 were only weakly dependent on the mean value.
H. G. Jones, I. G. Cumming
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Root Pressure and Leaf Water Potential
Science, 1966Measurements with thermocouple psychrometers were made of the water potentials of leaves from sunflower and pepper plants which had stood overnight in the dark in nutrient solutions containing carbowax. Similar measurements on the solutions showed that they had lower water potentials than the leaves, although the plants were measurably transpiring ...
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Transpiration and leaf water potentials of wheat in relation to changing soil water potential
Australian Journal of Agricultural Research, 1977Changes in the transpiration rate of wheat in drying soils were followed in experiments in which plants were grown in two small weighable lysimeters in a glasshouse. Hourly measurements of soil water potential (?s) were made at three depths in each lysimeter.
KA Seaton, JJ Landsberg, RH Sedgley
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Relationships of leaf diffusion resistance of Populus clones to leaf water potential and environment
Oecologia, 1979Leaf diffusion resistance (r 1) of the upper and lower leaf surfaces of several Populus clones was related to leaf water potential (ψ1), light intensity, vapor pressure deficit (VPD), and temperature by intrinsicallylinear, logarithmic multiple regression analyses. Regression equations accounted for up to 80% of variation in r 1 data.
S G, Pallardy, T T, Kozlowski
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Leaf Elongation in Relation to Leaf Water Potential in Soybean
Journal of Experimental Botany, 1977Leaf water potential, turgor pressure, and leaf elongation rate were measured in soybeans grow ing in controlled environment chambers, greenhouses, and outdoors. Plants in chambers had the highest water potentials and turgor pressures, and plants outdoors the lowest.
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The Components of Leaf Water Potential I. Osmotic and Matric Potentials
Australian Journal of Biological Sciences, 1967Osmotic potential ('IT) resulting from solutes should be distinguished from matric potential (T) resulting from adsorption by the tissue matrix. The usual methods of measuring so·called "osmotic potential" actually give not only 'IT but also part or all of T.
J Warren Wilson, CW Rose
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Leaf Water Potential Response to Transpiration by Citrus
Physiologia Plantarum, 1974AbstractThis paper reports on further studies of a model for interpreting leaf water potential data for Citrus. Experimental data confirmed the assumption that the ratio of vapor pressure deficit to leaf diffusion resistance adequately estimates transpiration when leaf‐to‐air temperature differences are small.
SAUL E. CAMACHO‐B +2 more
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Australian Journal of Experimental Agriculture, 2000
The water potentials of canola branches and leaves were compared using a pressure chamber to determine whether they produced similar results. This study also investigated the magnitude of errors in the water status of canola resulting from re-cutting the branches, and the effects of delaying readings.
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The water potentials of canola branches and leaves were compared using a pressure chamber to determine whether they produced similar results. This study also investigated the magnitude of errors in the water status of canola resulting from re-cutting the branches, and the effects of delaying readings.
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