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A technique to measure the components of root water potential using screen-caged thermocouple psychrometers

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Abstract

This paper describes a simple method which uses screen-caged thermocouple psychrometers to measure the water potential components of the roots of cotton (Gossypium hirsutum L.) grown in pots of sand or nutrient solution. Water stress was imposed by withholding irrigation from the sand-grown plants. Sampling was conducted inside a humidified chamber to prevent evaporative losses. The results obtained were within the range expected and comparable to the few published values for other plants. The technique enabled the demonstration of osmotic adjustment in cotton leaves and roots.

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Authors and Affiliations

  1. Altheimer Laboratory, Department of Agronomy, University of Arkansas, 72703, Fayetteville, AR, USA

    D. M. Oosterhuis

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  1. D. M. Oosterhuis
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Published with the approval of the Director of the Arkansas Agricultural Experiment Station.

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Oosterhuis, D.M. A technique to measure the components of root water potential using screen-caged thermocouple psychrometers. Plant Soil 103, 285–288 (1987). https://doi.org/10.1007/BF02370403

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  • DOI: https://doi.org/10.1007/BF02370403

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